//Chrome Drop Down Menu- Author: Dynamic Drive (http://www.dynamicdrive.com)
//Last updated: June 14th, 06'

var cssdropdown={
disappeardelay: 0, //set delay in miliseconds before menu disappears onmouseout
disablemenuclick: true, //when user clicks on a menu item with a drop down menu, disable menu item's link?
enableswipe: 1, //enable swipe effect? 1 for yes, 0 for no
onMusOverDiv: '',

//No need to edit beyond here////////////////////////
dropmenuobj: null, ie: document.all, firefox: document.getElementById&&!document.all, swipetimer: undefined, bottomclip:0,

getposOffset:function(what, offsettype){
var totaloffset=(offsettype=="left")? what.offsetLeft : what.offsetTop;
var parentEl=what.offsetParent;
while (parentEl!=null){
totaloffset=(offsettype=="left")? totaloffset+parentEl.offsetLeft : totaloffset+parentEl.offsetTop;
parentEl=parentEl.offsetParent;
}
return totaloffset;
},

swipeeffect:function(){
if (this.bottomclip<parseInt(this.dropmenuobj.offsetHeight)){
this.bottomclip+=10+(this.bottomclip/10) //unclip drop down menu visibility gradually
this.dropmenuobj.style.clip="rect(0 auto "+this.bottomclip+"px 0)"
}
else
return
this.swipetimer=setTimeout("cssdropdown.swipeeffect()", 10)
},

showhide:function(obj, e){
if (this.ie || this.firefox)
this.dropmenuobj.style.left=this.dropmenuobj.style.top="-500px"
if (e.type=="click" && obj.visibility==hidden || e.type=="mouseover"){
if (this.enableswipe==1){
if (typeof this.swipetimer!="undefined")
clearTimeout(this.swipetimer)
obj.clip="rect(0 auto 0 0)" //hide menu via clipping
this.bottomclip=0
this.swipeeffect()
}
obj.visibility="visible"
}
else if (e.type=="click")
obj.visibility="hidden"
},

iecompattest:function(){
return (document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body
},

clearbrowseredge:function(obj, whichedge){
var edgeoffset=0
if (whichedge=="rightedge"){
var windowedge=this.ie && !window.opera? this.iecompattest().scrollLeft+this.iecompattest().clientWidth-15 : window.pageXOffset+window.innerWidth-15
this.dropmenuobj.contentmeasure=this.dropmenuobj.offsetWidth
if (windowedge-this.dropmenuobj.x < this.dropmenuobj.contentmeasure)  //move menu to the left?
edgeoffset=this.dropmenuobj.contentmeasure-obj.offsetWidth
}
else{
var topedge=this.ie && !window.opera? this.iecompattest().scrollTop : window.pageYOffset
var windowedge=this.ie && !window.opera? this.iecompattest().scrollTop+this.iecompattest().clientHeight-15 : window.pageYOffset+window.innerHeight-18
this.dropmenuobj.contentmeasure=this.dropmenuobj.offsetHeight
if (windowedge-this.dropmenuobj.y < this.dropmenuobj.contentmeasure){ //move up?
edgeoffset=this.dropmenuobj.contentmeasure+obj.offsetHeight
if ((this.dropmenuobj.y-topedge)<this.dropmenuobj.contentmeasure) //up no good either?
edgeoffset=this.dropmenuobj.y+obj.offsetHeight-topedge
}
}
return edgeoffset
},

dropit:function(obj, e, dropmenuID,topOffset,clientWidth,navLevel){
	if (this.dropmenuobj!=null) //hide previous menu
	this.dropmenuobj.style.visibility="hidden" //hide menu
	this.clearhidemenu()
	if (this.ie||this.firefox)
	{
		obj.onmouseout=function()
		{
			cssdropdown.delayhidemenu();

			navId = this.getAttribute("rel")+"MainNav";
			objMainNav = document.getElementById(navId);
			
			if(navLevel=="MainMenu2")
			{
				cssdropdown.chgClassSubNav(objMainNav,'musOut');
			}
			else
			{
				cssdropdown.chgClass(objMainNav,'musOut');
			}
		}
		obj.onclick=function(){return !cssdropdown.disablemenuclick} //disable main menu item link onclick?
		this.dropmenuobj=document.getElementById(dropmenuID)
		this.dropmenuobj.onmouseover=function(){cssdropdown.clearhidemenu()}
		this.dropmenuobj.onmouseout=function(){cssdropdown.dynamichide(e)}
		this.dropmenuobj.onclick=function(){cssdropdown.delayhidemenu()}
		this.showhide(this.dropmenuobj.style, e)
		this.dropmenuobj.x=this.getposOffset(obj, "left")+12
		this.dropmenuobj.y=this.getposOffset(obj, "top");

		objImg = eval("document.getElementById('"+dropmenuID+"ImgBorder')");
		if(objImg)
		{
			if(this.dropmenuobj.clientWidth<(clientWidth-4))
			{
				this.dropmenuobj.style.width = (clientWidth-4)+"px";
				objImg.width = (clientWidth-4);
				objImg.height = 1;
			}
			else
			{
				if(this.onMusOverDiv.indexOf(","+dropmenuID+",")<=-1)
				{
					this.onMusOverDiv = this.onMusOverDiv + dropmenuID + ',';
					this.dropmenuobj.style.width = (this.dropmenuobj.clientWidth)+"px";
				}

				diffWidth = this.dropmenuobj.clientWidth - (clientWidth-5);
				objImg.width = (clientWidth-4);
				objImg.height = 1;
			}
			// img color is creating problem in different browsers. so detecting browser and chnaing the src path of the image used as seperator.
			if(this.ie)
			{
				if(navLevel=="MainMenu2")
					objImg.src = "images/dark_col_ie.gif";
				else
					objImg.src = "images/light_col_ie.gif";
			}
			else
			{
				if(navLevel=="MainMenu2")
					objImg.src = "images/dark_col.gif";
				else
					objImg.src = "images/light_col.gif";
			}
		}
	    

		this.dropmenuobj.style.left = (this.dropmenuobj.x-this.clearbrowseredge(obj, "rightedge"))+2+"px"
		this.dropmenuobj.style.top = (this.dropmenuobj.y-this.clearbrowseredge(obj, "bottomedge")+obj.offsetHeight+2) - topOffset + "px";
	}
},

contains_firefox:function(a, b) {
while (b.parentNode)
if ((b = b.parentNode) == a)
return true;
return false;
},

dynamichide:function(e){
var evtobj=window.event? window.event : e
if (this.ie&&!this.dropmenuobj.contains(evtobj.toElement))
this.delayhidemenu()
else if (this.firefox&&e.currentTarget!= evtobj.relatedTarget&& !this.contains_firefox(evtobj.currentTarget, evtobj.relatedTarget))
this.delayhidemenu()
},

delayhidemenu:function(){
this.delayhide=setTimeout("cssdropdown.dropmenuobj.style.visibility='hidden'",this.disappeardelay) //hide menu
},

clearhidemenu:function(){
if (this.delayhide!="undefined")
	clearTimeout(this.delayhide)
},

	chgClass:function(obj,action)
	{
		if(action=="musOver")
		{
			obj.className = 'main_nav_o';

			if ((version >= 5.5) && (version < 7) && (document.body.filters)) 
			{
				// following works in IE as a function has been used to fix the png image problem.
				spanObj = obj.getElementsByTagName("span");
				spanObjLen = spanObj.length;
				for(spanInd=0;spanInd<spanObjLen;spanInd++)
				{
					styleFilter = spanObj[spanInd].style.filter;
					spanObj[spanInd].style.filter = styleFilter.replace("navo_cr","nav_cr");
				}
			}
			else
			{
				imgObj = obj.getElementsByTagName("img");
				imgLen = imgObj.length;
				for(imgInd=0;imgInd<imgLen;imgInd++)
				{
					imgSrc = imgObj[imgInd].src;
					imgSrc = imgSrc.replace("navo_cr","nav_cr");
					imgObj[imgInd].src = imgSrc;
				}
			}
		}
		else
		{
			obj.className = '';
			if ((version >= 5.5) && (version < 7) && (document.body.filters)) 
			{
				spanObj = obj.getElementsByTagName("span");
				spanObjLen = spanObj.length;
				for(spanInd=0;spanInd<spanObjLen;spanInd++)
				{
					styleFilter = spanObj[spanInd].style.filter;
					spanObj[spanInd].style.filter = styleFilter.replace("nav_cr","navo_cr");
				}
			}
			else
			{
				imgObj = obj.getElementsByTagName("img");
				imgLen = imgObj.length;
				for(imgInd=0;imgInd<imgLen;imgInd++)
				{
					imgSrc = imgObj[imgInd].src;
					imgSrc = imgSrc.replace("nav_cr","navo_cr");
					imgObj[imgInd].src = imgSrc;
				}
			}
		}
	},

	chgClassSubNav:function(obj,action)
	{
		if(action=="musOver")
		{
			obj.className = 'sub_nav_o';
			
			if ((version >= 5.5) && (version < 7) && (document.body.filters)) 
			{
				// following works in IE as a function has been used to fix the png image problem.
				spanObj = obj.getElementsByTagName("span");
				spanObjLen = spanObj.length;
				for(spanInd=0;spanInd<spanObjLen;spanInd++)
				{
					styleFilter = spanObj[spanInd].style.filter;
					spanObj[spanInd].style.filter = styleFilter.replace("snav_c","snav_o_c");
				}
			}
			else
			{
				imgObj = obj.getElementsByTagName("img");
				imgLen = imgObj.length;
				for(imgInd=0;imgInd<imgLen;imgInd++)
				{
					imgSrc = imgObj[imgInd].src;
					imgSrc = imgSrc.replace("snav_c","snav_o_c");
					imgObj[imgInd].src = imgSrc;
				}
			}
		}
		else
		{
			obj.className = '';
			if ((version >= 5.5) && (version < 7) && (document.body.filters)) 
			{
				spanObj = obj.getElementsByTagName("span");
				spanObjLen = spanObj.length;
				for(spanInd=0;spanInd<spanObjLen;spanInd++)
				{
					styleFilter = spanObj[spanInd].style.filter;
					spanObj[spanInd].style.filter = styleFilter.replace("snav_o_c","snav_c");
				}
			}
			else
			{
				imgObj = obj.getElementsByTagName("img");
				imgLen = imgObj.length;
				for(imgInd=0;imgInd<imgLen;imgInd++)
				{
					imgSrc = imgObj[imgInd].src;
					imgSrc = imgSrc.replace("snav_o_c","snav_c");
					imgObj[imgInd].src = imgSrc;
				}
			}
		}
	},

	startchrome:function(){
		for (var ids=0; ids<arguments.length; ids++){
			var menuitems = document.getElementById(arguments[ids]).getElementsByTagName("a");
			
			for (var i=0; i<menuitems.length; i++){
				if (menuitems[i].getAttribute("rel")){
					var relvalue=menuitems[i].getAttribute("rel")

					menuitems[i].onmouseover=function(e){
						var event=typeof e!="undefined"? e : window.event;

						// getting the id of the navigation item
						navLevel = this.getAttribute("navLevel");
						navId = this.getAttribute("rel")+"MainNav";

						if(navLevel=="MainMenu2")
						{
							cssdropdown.chgClassSubNav(document.getElementById(navId),'musOver');
						}
						else
						{
							cssdropdown.chgClass(document.getElementById(navId),'musOver');
						}
						cssdropdown.dropit(this,event,this.getAttribute("rel"),this.getAttribute("offSet"),this.clientWidth,navLevel);
					}
				}
			}
		}
	}
}