var mainNav=function(){
var main={
obj_nav:$(arguments[0])||$("nav"),
settings:{
show_delay:0,
hide_delay:0,
_ie6:/MSIE 6.+Win/.test(navigator.userAgent),
_ie7:/MSIE 7.+Win/.test(navigator.userAgent)
},
init:function(obj,level){
obj.lists=obj.childElements();
obj.lists.each(function(el,ind){
main.handlNavElement(el);
if((main.settings._ie6||main.settings._ie7)&&level){
main.ieFixZIndex(el,ind,obj.lists.size());
}
});
if(main.settings._ie6&&!level){
document.execCommand("BackgroundImageCache",false,true);
}
},
handlNavElement:function(list){
if(list!==undefined){
list.onmouseover=function(){
main.fireNavEvent(this,true);
};
list.onmouseout=function(){
main.fireNavEvent(this,false);
};
if(list.down("ul")){
main.init(list.down("ul"),true);
}
}
},
ieFixZIndex:function(el,i,l){
if(el.tagName.toString().toLowerCase().indexOf("iframe")==-1){
el.style.zIndex=l-i;
}else{
el.onmouseover="null";
el.onmouseout="null";
}
},
fireNavEvent:function(elm,ev){
if(ev){
elm.addClassName("over");
elm.down("a").addClassName("over");
if(elm.childElements()[1]){
main.show(elm.childElements()[1]);
}
}else{
elm.removeClassName("over");
elm.down("a").removeClassName("over");
if(elm.childElements()[1]){
main.hide(elm.childElements()[1]);
}
}
},
show:function(sub_elm){
if(sub_elm.hide_time_id){
clearTimeout(sub_elm.hide_time_id);
}
sub_elm.show_time_id=setTimeout(function(){
if(!sub_elm.hasClassName("shown-sub")){
sub_elm.addClassName("shown-sub");
}
},main.settings.show_delay);
},
hide:function(sub_elm){
if(sub_elm.show_time_id){
clearTimeout(sub_elm.show_time_id);
}
sub_elm.hide_time_id=setTimeout(function(){
if(sub_elm.hasClassName("shown-sub")){
sub_elm.removeClassName("shown-sub");
}
},main.settings.hide_delay);
}
};
if(arguments[1]){
main.settings=Object.extend(main.settings,arguments[1]);
}
if(main.obj_nav){
main.init(main.obj_nav,false);
}
};
document.observe("dom:loaded",function(){
mainNav("nav",{"show_delay":"100","hide_delay":"100"});
});