MediaWiki:Common.js
Revisión del 16:01 9 abr 2021 de David (discusión | contribuciones)
Nota: tras guardar, quizás necesites actualizar la caché de tu navegador para ver los cambios.
- Firefox/Safari: Mantén presionada la tecla Mayús mientras pulsas el botón Actualizar, o presiona Ctrl+F5 o Ctrl+R (⌘+R en Mac)
- Google Chrome: presiona Ctrl+Shift+R (⌘+Mayús+R en Mac)
- Internet Explorer: mantén presionada Ctrl mientras pulsas Actualizar, o presiona Ctrl+F5
- Opera: dirígete a Menú → Configuración (Opera → Preferencias en Mac) y luego a Privacidad y seguridad → Borrar datos de navegación → Imágenes y archivos en caché.
/* Cualquier código JavaScript escrito aquí se cargará para todos los usuarios en cada carga de página */
//Edición
if ( $.inArray(mw.config.get('wgAction'), ['edit', 'submit'] ) > -1) {
/** Fix edit summary prompt for undo ******************************************
* Fixes the fact that the undo function combined with the "no edit summary prompter"
* causes problems if leaving the edit summary unchanged.
* Added by [[User:Deskana]], code by [[User:Tra]].
* See also [[bugzilla:8912]].
*/
$(document).ready( function () {
if (document.location.search.indexOf("undo=") != -1 && document.getElementsByName('wpAutoSummary')[0]) {
document.getElementsByName('wpAutoSummary')[0].value = '1';
}
});
/**
* Caracteres especiales (edittools)
* Crea (y coloca) el ''combobox'' que permite seleccionar un conjunto determinado de
* caracteres especiales bajo la caja de edición.
* Funciona en conjunto con [[MediaWiki:Edittools]] y [[MediaWiki:Edittools.js]].
* Basado en [[commons:MediaWiki:Edittools.js]].
*/
importScript('MediaWiki:Edittools.javascript');
//Seguimiento
} else if (mw.config.get('wgPageName') == 'Especial:Seguimiento') {
mw.loader.load( mw.config.get('wgServer') + mw.config.get('wgScript') +
'?title=MediaWiki:Common.js/seguimiento.js&action=raw&ctype=text/javascript&smaxage=21600&maxage=86400');
}
// BEGIN Main Page carousel code
/*!
jCarousel - v0.3.0 - 2013-11-22
http://sorgalla.com/jcarousel
Copyright (c) 2013 Jan Sorgalla; Licensed MIT
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
*/
(function(t){"use strict";var i=t.jCarousel={};i.version="0.3.0";var s=/^([+\-]=)?(.+)$/;i.parseTarget=function(t){var i=!1,e="object"!=typeof t?s.exec(t):null;return e?(t=parseInt(e[2],10)||0,e[1]&&(i=!0,"-="===e[1]&&(t*=-1))):"object"!=typeof t&&(t=parseInt(t,10)||0),{target:t,relative:i}},i.detectCarousel=function(t){for(var i;t.length>0;){if(i=t.filter("[data-jcarousel]"),i.length>0)return i;if(i=t.find("[data-jcarousel]"),i.length>0)return i;t=t.parent()}return null},i.base=function(s){return{version:i.version,_options:{},_element:null,_carousel:null,_init:t.noop,_create:t.noop,_destroy:t.noop,_reload:t.noop,create:function(){return this._element.attr("data-"+s.toLowerCase(),!0).data(s,this),!1===this._trigger("create")?this:(this._create(),this._trigger("createend"),this)},destroy:function(){return!1===this._trigger("destroy")?this:(this._destroy(),this._trigger("destroyend"),this._element.removeData(s).removeAttr("data-"+s.toLowerCase()),this)},reload:function(t){return!1===this._trigger("reload")?this:(t&&this.options(t),this._reload(),this._trigger("reloadend"),this)},element:function(){return this._element},options:function(i,s){if(0===arguments.length)return t.extend({},this._options);if("string"==typeof i){if(s===void 0)return this._options[i]===void 0?null:this._options[i];this._options[i]=s}else this._options=t.extend({},this._options,i);return this},carousel:function(){return this._carousel||(this._carousel=i.detectCarousel(this.options("carousel")||this._element),this._carousel||t.error('Could not detect carousel for plugin "'+s+'"')),this._carousel},_trigger:function(i,e,r){var n,o=!1;return r=[this].concat(r||[]),(e||this._element).each(function(){n=t.Event((s+":"+i).toLowerCase()),t(this).trigger(n,r),n.isDefaultPrevented()&&(o=!0)}),!o}}},i.plugin=function(s,e){var r=t[s]=function(i,s){this._element=t(i),this.options(s),this._init(),this.create()};return r.fn=r.prototype=t.extend({},i.base(s),e),t.fn[s]=function(i){var e=Array.prototype.slice.call(arguments,1),n=this;return"string"==typeof i?this.each(function(){var r=t(this).data(s);if(!r)return t.error("Cannot call methods on "+s+" prior to initialization; "+'attempted to call method "'+i+'"');if(!t.isFunction(r[i])||"_"===i.charAt(0))return t.error('No such method "'+i+'" for '+s+" instance");var o=r[i].apply(r,e);return o!==r&&o!==void 0?(n=o,!1):void 0}):this.each(function(){var e=t(this).data(s);e instanceof r?e.reload(i):new r(this,i)}),n},r}})(jQuery),function(t,i){"use strict";var s=function(t){return parseFloat(t)||0};t.jCarousel.plugin("jcarousel",{animating:!1,tail:0,inTail:!1,resizeTimer:null,lt:null,vertical:!1,rtl:!1,circular:!1,underflow:!1,relative:!1,_options:{list:function(){return this.element().children().eq(0)},items:function(){return this.list().children()},animation:400,transitions:!1,wrap:null,vertical:null,rtl:null,center:!1},_list:null,_items:null,_target:null,_first:null,_last:null,_visible:null,_fullyvisible:null,_init:function(){var t=this;return this.onWindowResize=function(){t.resizeTimer&&clearTimeout(t.resizeTimer),t.resizeTimer=setTimeout(function(){t.reload()},100)},this},_create:function(){this._reload(),t(i).on("resize.jcarousel",this.onWindowResize)},_destroy:function(){t(i).off("resize.jcarousel",this.onWindowResize)},_reload:function(){this.vertical=this.options("vertical"),null==this.vertical&&(this.vertical=this.list().height()>this.list().width()),this.rtl=this.options("rtl"),null==this.rtl&&(this.rtl=function(i){if("rtl"===(""+i.attr("dir")).toLowerCase())return!0;var s=!1;return i.parents("[dir]").each(function(){return/rtl/i.test(t(this).attr("dir"))?(s=!0,!1):void 0}),s}(this._element)),this.lt=this.vertical?"top":"left",this.relative="relative"===this.list().css("position"),this._list=null,this._items=null;var i=this._target&&this.index(this._target)>=0?this._target:this.closest();this.circular="circular"===this.options("wrap"),this.underflow=!1;var s={left:0,top:0};return i.length>0&&(this._prepare(i),this.list().find("[data-jcarousel-clone]").remove(),this._items=null,this.underflow=this._fullyvisible.length>=this.items().length,this.circular=this.circular&&!this.underflow,s[this.lt]=this._position(i)+"px"),this.move(s),this},list:function(){if(null===this._list){var i=this.options("list");this._list=t.isFunction(i)?i.call(this):this._element.find(i)}return this._list},items:function(){if(null===this._items){var i=this.options("items");this._items=(t.isFunction(i)?i.call(this):this.list().find(i)).not("[data-jcarousel-clone]")}return this._items},index:function(t){return this.items().index(t)},closest:function(){var i,e=this,r=this.list().position()[this.lt],n=t(),o=!1,l=this.vertical?"bottom":this.rtl&&!this.relative?"left":"right";return this.rtl&&this.relative&&!this.vertical&&(r+=this.list().width()-this.clipping()),this.items().each(function(){if(n=t(this),o)return!1;var a=e.dimension(n);if(r+=a,r>=0){if(i=a-s(n.css("margin-"+l)),!(0>=Math.abs(r)-a+i/2))return!1;o=!0}}),n},target:function(){return this._target},first:function(){return this._first},last:function(){return this._last},visible:function(){return this._visible},fullyvisible:function(){return this._fullyvisible},hasNext:function(){if(!1===this._trigger("hasnext"))return!0;var t=this.options("wrap"),i=this.items().length-1;return i>=0&&(t&&"first"!==t||i>this.index(this._last)||this.tail&&!this.inTail)?!0:!1},hasPrev:function(){if(!1===this._trigger("hasprev"))return!0;var t=this.options("wrap");return this.items().length>0&&(t&&"last"!==t||this.index(this._first)>0||this.tail&&this.inTail)?!0:!1},clipping:function(){return this._element["inner"+(this.vertical?"Height":"Width")]()},dimension:function(t){return t["outer"+(this.vertical?"Height":"Width")](!0)},scroll:function(i,s,e){if(this.animating)return this;if(!1===this._trigger("scroll",null,[i,s]))return this;t.isFunction(s)&&(e=s,s=!0);var r=t.jCarousel.parseTarget(i);if(r.relative){var n,o,l,a,h,u,c,f,d=this.items().length-1,_=Math.abs(r.target),p=this.options("wrap");if(r.target>0){var v=this.index(this._last);if(v>=d&&this.tail)this.inTail?"both"===p||"last"===p?this._scroll(0,s,e):t.isFunction(e)&&e.call(this,!1):this._scrollTail(s,e);else if(n=this.index(this._target),this.underflow&&n===d&&("circular"===p||"both"===p||"last"===p)||!this.underflow&&v===d&&("both"===p||"last"===p))this._scroll(0,s,e);else if(l=n+_,this.circular&&l>d){for(f=d,h=this.items().get(-1);l>f++;)h=this.items().eq(0),u=this._visible.index(h)>=0,u&&h.after(h.clone(!0).attr("data-jcarousel-clone",!0)),this.list().append(h),u||(c={},c[this.lt]=this.dimension(h),this.moveBy(c)),this._items=null;this._scroll(h,s,e)}else this._scroll(Math.min(l,d),s,e)}else if(this.inTail)this._scroll(Math.max(this.index(this._first)-_+1,0),s,e);else if(o=this.index(this._first),n=this.index(this._target),a=this.underflow?n:o,l=a-_,0>=a&&(this.underflow&&"circular"===p||"both"===p||"first"===p))this._scroll(d,s,e);else if(this.circular&&0>l){for(f=l,h=this.items().get(0);0>f++;){h=this.items().eq(-1),u=this._visible.index(h)>=0,u&&h.after(h.clone(!0).attr("data-jcarousel-clone",!0)),this.list().prepend(h),this._items=null;var g=this.dimension(h);c={},c[this.lt]=-g,this.moveBy(c)}this._scroll(h,s,e)}else this._scroll(Math.max(l,0),s,e)}else this._scroll(r.target,s,e);return this._trigger("scrollend"),this},moveBy:function(t,i){var e=this.list().position(),r=1,n=0;return this.rtl&&!this.vertical&&(r=-1,this.relative&&(n=this.list().width()-this.clipping())),t.left&&(t.left=e.left+n+s(t.left)*r+"px"),t.top&&(t.top=e.top+n+s(t.top)*r+"px"),this.move(t,i)},move:function(i,s){s=s||{};var e=this.options("transitions"),r=!!e,n=!!e.transforms,o=!!e.transforms3d,l=s.duration||0,a=this.list();if(!r&&l>0)return a.animate(i,s),void 0;var h=s.complete||t.noop,u={};if(r){var c=a.css(["transitionDuration","transitionTimingFunction","transitionProperty"]),f=h;h=function(){t(this).css(c),f.call(this)},u={transitionDuration:(l>0?l/1e3:0)+"s",transitionTimingFunction:e.easing||s.easing,transitionProperty:l>0?function(){return n||o?"all":i.left?"left":"top"}():"none",transform:"none"}}o?u.transform="translate3d("+(i.left||0)+","+(i.top||0)+",0)":n?u.transform="translate("+(i.left||0)+","+(i.top||0)+")":t.extend(u,i),r&&l>0&&a.one("transitionend webkitTransitionEnd oTransitionEnd otransitionend MSTransitionEnd",h),a.css(u),0>=l&&a.each(function(){h.call(this)})},_scroll:function(i,s,e){if(this.animating)return t.isFunction(e)&&e.call(this,!1),this;if("object"!=typeof i?i=this.items().eq(i):i.jquery===void 0&&(i=t(i)),0===i.length)return t.isFunction(e)&&e.call(this,!1),this;this.inTail=!1,this._prepare(i);var r=this._position(i),n=this.list().position()[this.lt];if(r===n)return t.isFunction(e)&&e.call(this,!1),this;var o={};return o[this.lt]=r+"px",this._animate(o,s,e),this},_scrollTail:function(i,s){if(this.animating||!this.tail)return t.isFunction(s)&&s.call(this,!1),this;var e=this.list().position()[this.lt];this.rtl&&this.relative&&!this.vertical&&(e+=this.list().width()-this.clipping()),this.rtl&&!this.vertical?e+=this.tail:e-=this.tail,this.inTail=!0;var r={};return r[this.lt]=e+"px",this._update({target:this._target.next(),fullyvisible:this._fullyvisible.slice(1).add(this._visible.last())}),this._animate(r,i,s),this},_animate:function(i,s,e){if(e=e||t.noop,!1===this._trigger("animate"))return e.call(this,!1),this;this.animating=!0;var r=this.options("animation"),n=t.proxy(function(){this.animating=!1;var t=this.list().find("[data-jcarousel-clone]");t.length>0&&(t.remove(),this._reload()),this._trigger("animateend"),e.call(this,!0)},this),o="object"==typeof r?t.extend({},r):{duration:r},l=o.complete||t.noop;return s===!1?o.duration=0:t.fx.speeds[o.duration]!==void 0&&(o.duration=t.fx.speeds[o.duration]),o.complete=function(){n(),l.call(this)},this.move(i,o),this},_prepare:function(i){var e,r,n,o,l=this.index(i),a=l,h=this.dimension(i),u=this.clipping(),c=this.vertical?"bottom":this.rtl?"left":"right",f=this.options("center"),d={target:i,first:i,last:i,visible:i,fullyvisible:u>=h?i:t()};if(f&&(h/=2,u/=2),u>h)for(;;){if(e=this.items().eq(++a),0===e.length){if(!this.circular)break;if(e=this.items().eq(0),i.get(0)===e.get(0))break;if(r=this._visible.index(e)>=0,r&&e.after(e.clone(!0).attr("data-jcarousel-clone",!0)),this.list().append(e),!r){var _={};_[this.lt]=this.dimension(e),this.moveBy(_)}this._items=null}if(o=this.dimension(e),0===o)break;if(h+=o,d.last=e,d.visible=d.visible.add(e),n=s(e.css("margin-"+c)),u>=h-n&&(d.fullyvisible=d.fullyvisible.add(e)),h>=u)break}if(!this.circular&&!f&&u>h)for(a=l;;){if(0>--a)break;if(e=this.items().eq(a),0===e.length)break;if(o=this.dimension(e),0===o)break;if(h+=o,d.first=e,d.visible=d.visible.add(e),n=s(e.css("margin-"+c)),u>=h-n&&(d.fullyvisible=d.fullyvisible.add(e)),h>=u)break}return this._update(d),this.tail=0,f||"circular"===this.options("wrap")||"custom"===this.options("wrap")||this.index(d.last)!==this.items().length-1||(h-=s(d.last.css("margin-"+c)),h>u&&(this.tail=h-u)),this},_position:function(t){var i=this._first,s=i.position()[this.lt],e=this.options("center"),r=e?this.clipping()/2-this.dimension(i)/2:0;return this.rtl&&!this.vertical?(s-=this.relative?this.list().width()-this.dimension(i):this.clipping()-this.dimension(i),s+=r):s-=r,!e&&(this.index(t)>this.index(i)||this.inTail)&&this.tail?(s=this.rtl&&!this.vertical?s-this.tail:s+this.tail,this.inTail=!0):this.inTail=!1,-s},_update:function(i){var s,e=this,r={target:this._target||t(),first:this._first||t(),last:this._last||t(),visible:this._visible||t(),fullyvisible:this._fullyvisible||t()},n=this.index(i.first||r.first)<this.index(r.first),o=function(s){var o=[],l=[];i[s].each(function(){0>r[s].index(this)&&o.push(this)}),r[s].each(function(){0>i[s].index(this)&&l.push(this)}),n?o=o.reverse():l=l.reverse(),e._trigger(s+"in",t(o)),e._trigger(s+"out",t(l)),e["_"+s]=i[s]};for(s in i)o(s);return this}})}(jQuery,window),function(t){"use strict";t.jcarousel.fn.scrollIntoView=function(i,s,e){var r,n=t.jCarousel.parseTarget(i),o=this.index(this._fullyvisible.first()),l=this.index(this._fullyvisible.last());if(r=n.relative?0>n.target?Math.max(0,o+n.target):l+n.target:"object"!=typeof n.target?n.target:this.index(n.target),o>r)return this.scroll(r,s,e);if(r>=o&&l>=r)return t.isFunction(e)&&e.call(this,!1),this;for(var a,h=this.items(),u=this.clipping(),c=this.vertical?"bottom":this.rtl?"left":"right",f=0;;){if(a=h.eq(r),0===a.length)break;if(f+=this.dimension(a),f>=u){var d=parseFloat(a.css("margin-"+c))||0;f-d!==u&&r++;break}if(0>=r)break;r--}return this.scroll(r,s,e)}}(jQuery),function(t){"use strict";t.jCarousel.plugin("jcarouselControl",{_options:{target:"+=1",event:"click",method:"scroll"},_active:null,_init:function(){this.onDestroy=t.proxy(function(){this._destroy(),this.carousel().one("jcarousel:createend",t.proxy(this._create,this))},this),this.onReload=t.proxy(this._reload,this),this.onEvent=t.proxy(function(i){i.preventDefault();var s=this.options("method");t.isFunction(s)?s.call(this):this.carousel().jcarousel(this.options("method"),this.options("target"))},this)},_create:function(){this.carousel().one("jcarousel:destroy",this.onDestroy).on("jcarousel:reloadend jcarousel:scrollend",this.onReload),this._element.on(this.options("event")+".jcarouselcontrol",this.onEvent),this._reload()},_destroy:function(){this._element.off(".jcarouselcontrol",this.onEvent),this.carousel().off("jcarousel:destroy",this.onDestroy).off("jcarousel:reloadend jcarousel:scrollend",this.onReload)},_reload:function(){var i,s=t.jCarousel.parseTarget(this.options("target")),e=this.carousel();if(s.relative)i=e.jcarousel(s.target>0?"hasNext":"hasPrev");else{var r="object"!=typeof s.target?e.jcarousel("items").eq(s.target):s.target;i=e.jcarousel("target").index(r)>=0}return this._active!==i&&(this._trigger(i?"active":"inactive"),this._active=i),this}})}(jQuery),function(t){"use strict";t.jCarousel.plugin("jcarouselPagination",{_options:{perPage:null,item:function(t){return'<a href="#'+t+'">'+t+"</a>"},event:"click",method:"scroll"},_pages:{},_items:{},_currentPage:null,_init:function(){this.onDestroy=t.proxy(function(){this._destroy(),this.carousel().one("jcarousel:createend",t.proxy(this._create,this))},this),this.onReload=t.proxy(this._reload,this),this.onScroll=t.proxy(this._update,this)},_create:function(){this.carousel().one("jcarousel:destroy",this.onDestroy).on("jcarousel:reloadend",this.onReload).on("jcarousel:scrollend",this.onScroll),this._reload()},_destroy:function(){this._clear(),this.carousel().off("jcarousel:destroy",this.onDestroy).off("jcarousel:reloadend",this.onReload).off("jcarousel:scrollend",this.onScroll)},_reload:function(){var i=this.options("perPage");if(this._pages={},this._items={},t.isFunction(i)&&(i=i.call(this)),null==i)this._pages=this._calculatePages();else for(var s,e=parseInt(i,10)||0,r=this.carousel().jcarousel("items"),n=1,o=0;;){if(s=r.eq(o++),0===s.length)break;this._pages[n]=this._pages[n]?this._pages[n].add(s):s,0===o%e&&n++}this._clear();var l=this,a=this.carousel().data("jcarousel"),h=this._element,u=this.options("item");t.each(this._pages,function(i,s){var e=l._items[i]=t(u.call(l,i,s));e.on(l.options("event")+".jcarouselpagination",t.proxy(function(){var t=s.eq(0);if(a.circular){var e=a.index(a.target()),r=a.index(t);parseFloat(i)>parseFloat(l._currentPage)?e>r&&(t="+="+(a.items().length-e+r)):r>e&&(t="-="+(e+(a.items().length-r)))}a[this.options("method")](t)},l)),h.append(e)}),this._update()},_update:function(){var i,s=this.carousel().jcarousel("target");t.each(this._pages,function(t,e){return e.each(function(){return s.is(this)?(i=t,!1):void 0}),i?!1:void 0}),this._currentPage!==i&&(this._trigger("inactive",this._items[this._currentPage]),this._trigger("active",this._items[i])),this._currentPage=i},items:function(){return this._items},_clear:function(){this._element.empty(),this._currentPage=null},_calculatePages:function(){for(var t,i=this.carousel().data("jcarousel"),s=i.items(),e=i.clipping(),r=0,n=0,o=1,l={};;){if(t=s.eq(n++),0===t.length)break;l[o]=l[o]?l[o].add(t):t,r+=i.dimension(t),r>=e&&(o++,r=0)}return l}})}(jQuery),function(t){"use strict";t.jCarousel.plugin("jcarouselAutoscroll",{_options:{target:"+=1",interval:3e3,autostart:!0},_timer:null,_init:function(){this.onDestroy=t.proxy(function(){this._destroy(),this.carousel().one("jcarousel:createend",t.proxy(this._create,this))},this),this.onAnimateEnd=t.proxy(this.start,this)},_create:function(){this.carousel().one("jcarousel:destroy",this.onDestroy),this.options("autostart")&&this.start()},_destroy:function(){this.stop(),this.carousel().off("jcarousel:destroy",this.onDestroy)},start:function(){return this.stop(),this.carousel().one("jcarousel:animateend",this.onAnimateEnd),this._timer=setTimeout(t.proxy(function(){this.carousel().jcarousel("scroll",this.options("target"))},this),this.options("interval")),this},stop:function(){return this._timer&&(this._timer=clearTimeout(this._timer)),this.carousel().off("jcarousel:animateend",this.onAnimateEnd),this}})}(jQuery);
$(function() {
$('.jcarousel')
.on('jcarousel:create jcarousel:reload', function() {
var element = $(this),
width = element.innerWidth();
// This shows 1 item at a time.
// Divide `width` to the number of items you want to display,
// eg. `width = width / 3` to display 3 items at a time.
element.jcarousel('items').css('width', width + 'px');
})
.jcarousel({
// Configuration goes here
wrap: 'both',
animation: 1200,
center: true
})
.jcarouselAutoscroll({
interval: 10000,
target: '+=1',
autostart: true
});
$('.jcarousel-control-prev')
.on('jcarouselcontrol:active', function() {
$(this).removeClass('inactive');
})
.on('jcarouselcontrol:inactive', function() {
$(this).addClass('inactive');
})
.jcarouselControl({
target: '-=1'
});
$('.jcarousel-control-next')
.on('jcarouselcontrol:active', function() {
$(this).removeClass('inactive');
})
.on('jcarouselcontrol:inactive', function() {
$(this).addClass('inactive');
})
.jcarouselControl({
target: '+=1'
});
$('.jcarousel-pagination')
.on('jcarouselpagination:active', 'a', function() {
$(this).addClass('active');
})
.on('jcarouselpagination:inactive', 'a', function() {
$(this).removeClass('active');
})
.jcarouselPagination();
});
// END Main Page carousel code
//Ticker de la portada
var width = $('.ticker-text').width(),
containerwidth = $('.ticker-container').width(),
left = containerwidth;
$(document).ready(function(e){
function tick() {
if(--left < -width){
left = containerwidth;
}
$(".ticker-text").css("margin-left", left + "px");
setTimeout(tick, 8); //El número indica la velocitat (Més petit més ràpid)
}
tick();
});
//END Ticker de la portada
$(document).ready(function(){
$("#hide").on('click', function() {
$("#element").hide();
return false;
});
$("#show").on('click', function() {
$("#element").show();
return false;
});
});
function muestra_oculta(id){
if (document.getElementById){ //se obtiene el id
var el = document.getElementById(id); //se define la variable "el" igual a nuestro div
el.style.display = (el.style.display == 'none') ? 'block' : 'none'; //damos un atributo display:none que oculta el div
}
}
window.onload = function(){/*hace que se cargue la función lo que predetermina que div estará oculto hasta llamar a la función nuevamente*/
muestra_oculta('contenido');/* "contenido_a_mostrar" es el nombre que le dimos al DIV */
}