var Hover=function(navBar)
{var me=this;me.items=navBar.select("ul")[0].childElements();me.items.each(function(item){me.initItem(item);});}
Hover.prototype.initItem=function(item)
{var me=this;item.onmouseover=function()
{me.closeAllExcept(item);clearTimeout(me.closeTimeout);me.openTimeout=setTimeout(function()
{item.addClassName('over');item.setStyle({zIndex:9999});},Hover.OPEN_TIMEOUT);};item.onmouseout=function()
{clearTimeout(me.openTimeout);me.closeTimeout=setTimeout(function()
{item.removeClassName('over');},Hover.CLOSE_TIMEOUT);};}
Hover.prototype.closeAllExcept=function(exceptItem)
{this.items.each(function(item)
{if(item!=exceptItem)
item.removeClassName('over');});}
Hover.OPEN_TIMEOUT=50;Hover.CLOSE_TIMEOUT=500;document.observe("dom:loaded",function(){new Hover($("navigation"));})