Menu Desplegable hacia abajo con js

[sandymiau]

Solo copialo, pegalo y agrega el link de jquery.

Aqui estan codigos jquery, en la siguiente respuesta codigo html5 y en la ultima codigo css.


<script type="text/javascript" src="js/jquery-1.2.6.min.js"></script>
<script type="text/javascript">
(function($){
/* hoverIntent by Brian Cherne */
$.fn.hoverIntent = function(f,g) {
// default configuration options
var cfg = {
sensitivity: 7,
interval: 100,
timeout: 0
};
// override configuration options with user supplied object
cfg = $.extend(cfg, g ? { over: f, out: g } : f );
// instantiate variables
// cX, cY = current X and Y position of mouse, updated by mousemove event
// pX, pY = previous X and Y position of mouse, set by mouseover and polling interval
var cX, cY, pX, pY;
// A private function for getting mouse position
var track = function(ev) {
cX = ev.pageX;
cY = ev.pageY;
};
// A private function for comparing current and previous mouse position
var compare = function(ev,ob) {
ob.hoverIntent_t = clearTimeout(ob.hoverIntent_t);
// compare mouse positions to see if they've crossed the threshold
if ( ( Math.abs(pX-cX) + Math.abs(pY-cY) ) < cfg.sensitivity ) {
$(ob).unbind("mousemove",track);
// set hoverIntent state to true (so mouseOut can be called)
ob.hoverIntent_s = 1;
return cfg.over.apply(ob,[ev]);
} else {
// set previous coordinates for next time
pX = cX; pY = cY;
// use self-calling timeout, guarantees intervals are spaced out properly (avoids JavaScript timer bugs)
ob.hoverIntent_t = setTimeout( function(){compare(ev, ob);} , cfg.interval );
}
};
// A private function for delaying the mouseOut function
var delay = function(ev,ob) {
ob.hoverIntent_t = clearTimeout(ob.hoverIntent_t);
ob.hoverIntent_s = 0;
return cfg.out.apply(ob,[ev]);
};
// A private function for handling mouse 'hovering'
var handleHover = function(e) {
// next three lines copied from jQuery.hover, ignore children onMouseOver/onMouseOut
var p = (e.type == "mouseover" ? e.fromElement : e.toElement) || e.relatedTarget;
while ( p && p != this ) { try { p = p.parentNode; } catch(e) { p = this; } }
if ( p == this ) { return false; }
// copy objects to be passed into t (required for event object to be passed in IE)
var ev = jQuery.extend({},e);
var ob = this;
// cancel hoverIntent timer if it exists
if (ob.hoverIntent_t) { ob.hoverIntent_t = clearTimeout(ob.hoverIntent_t); }
// else e.type == "onmouseover"
if (e.type == "mouseover") {
// set "previous" X and Y position based on initial entry point
pX = ev.pageX; pY = ev.pageY;
// update "current" X and Y position based on mousemove
$(ob).bind("mousemove",track);
// start polling interval (self-calling timeout) to compare mouse coordinates over time
if (ob.hoverIntent_s != 1) { ob.hoverIntent_t = setTimeout( function(){compare(ev,ob);} , cfg.interval );}
// else e.type == "onmouseout"
} else {
// unbind expensive mousemove event
$(ob).unbind("mousemove",track);
// if hoverIntent state is true, then call the mouseOut function after the specified delay
if (ob.hoverIntent_s == 1) { ob.hoverIntent_t = setTimeout( function(){delay(ev,ob);} , cfg.timeout );}
}
};
// bind the function to the two event listeners
return this.mouseover(handleHover).mouseout(handleHover);
};
})(jQuery);
</script>
<script type="text/javascript" >
/*
* Superfish v1.4.8 - jQuery menu widget
* Copyright (c) 2008 Joel Birch
*
* Dual licensed under the MIT and GPL licenses:
* http://www.opensource.org/licenses/mit-license.php
* http://www.gnu.org/licenses/gpl.html
*
* CHANGELOG: http://users.tpg.com.au/j_birch/plugins/superfish/changelog.txt
*/
;(function($){
$.fn.superfish = function(op){
var sf = $.fn.superfish,
c = sf.c,
$arrow = $(['<span class="',c.arrowClass,'"> »</span>'].join('')),
over = function(){
var $$ = $(this), menu = getMenu($$);
clearTimeout(menu.sfTimer);
$$.showSuperfishUl().siblings().hideSuperfishUl();
},
out = function(){
var $$ = $(this), menu = getMenu($$), o = sf.op;
clearTimeout(menu.sfTimer);
menu.sfTimer=setTimeout(function(){
o.retainPath=($.inArray($$[0],o.$path)>-1);
$$.hideSuperfishUl();
if (o.$path.length && $$.parents(['li.',o.hoverClass].join('')).length<1){over.call(o.$path);}
},o.delay);
},
getMenu = function($menu){
var menu = $menu.parents(['ul.',c.menuClass,':first'].join(''))[0];
sf.op = sf.o[menu.serial];
return menu;
},
addArrow = function($a){ $a.addClass(c.anchorClass).append($arrow.clone()); };
return this.each(function() {
var s = this.serial = sf.o.length;
var o = $.extend({},sf.defaults,op);
o.$path = $('li.'+o.pathClass,this).slice(0,o.pathLevels).ea ch(function(){
$(this).addClass([o.hoverClass,c.bcClass].join(' '))
.filter('li:has(ul)').removeClass(o.pathClass);
});
sf.o[s] = sf.op = o;
$('li:has(ul)',this)[($.fn.hoverIntent && !o.disableHI) ? 'hoverIntent' : 'hover'](over,out).each(function() {
if (o.autoArrows) addArrow( $('>a:first-child',this) );
})
.not('.'+c.bcClass)
.hideSuperfishUl();
var $a = $('a',this);
$a.each(function(i){
var $li = $a.eq(i).parents('li');
$a.eq(i).focus(function(){over.call($li);}).blur(f unction(){out.call($li);});
});
o.onInit.call(this);
}).each(function() {
var menuClasses = [c.menuClass];
if (sf.op.dropShadows && !($.browser.msie && $.browser.version < 7)) menuClasses.push(c.shadowClass);
$(this).addClass(menuClasses.join(' '));
});
};
var sf = $.fn.superfish;
sf.o = [];
sf.op = {};
sf.IE7fix = function(){
var o = sf.op;
if ($.browser.msie && $.browser.version > 6 && o.dropShadows && o.animation.opacity!=undefined)
this.toggleClass(sf.c.shadowClass+'-off');
};
sf.c = {
bcClass : 'sf-breadcrumb',
menuClass : 'sf-js-enabled',
anchorClass : 'sf-with-ul',
arrowClass : 'sf-sub-indicator',
shadowClass : 'sf-shadow'
};
sf.defaults = {
hoverClass : 'sfHover',
pathClass : 'overideThisToUse',
pathLevels : 1,
delay : 800,
animation : {opacity:'show'},
speed : 'normal',
autoArrows : true,
dropShadows : true,
disableHI : false, // true disables hoverIntent detection
onInit : function(){}, // callback functions
onBeforeShow: function(){},
onShow : function(){},
onHide : function(){}
};
$.fn.extend({
hideSuperfishUl : function(){
var o = sf.op,
not = (o.retainPath===true) ? o.$path : '';
o.retainPath = false;
var $ul = $(['li.',o.hoverClass].join(''),this).add(this).not(not).removeClass(o.h overClass)
.find('>ul').hide().css('visibility','hidden');
o.onHide.call($ul);
return this;
},
showSuperfishUl : function(){
var o = sf.op,
sh = sf.c.shadowClass+'-off',
$ul = this.addClass(o.hoverClass)
.find('>ul:hidden').css('visibility','visible');
sf.IE7fix.call($ul);
o.onBeforeShow.call($ul);
$ul.animate(o.animation,o.speed,function(){ sf.IE7fix.call($ul); o.onShow.call($ul); });
return this;
}
});
})(jQuery);
</script>
<script type="text/javascript">
// Inicia plugins
jQuery(function(){
jQuery('ul.sf-menu').superfish();
});
</script>
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