// JavaScript Document

//Chrome Drop Down Menu- Author: Dynamic Drive (http://www.dynamicdrive.com)
//Last updated: Jan 1st, 06'

var cssdropdown={
disappeardelay: 250, //set delay in miliseconds before menu disappears onmouseout

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

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;
},

showhide:function(obj, e, visible, hidden){
if (this.ie || this.firefox)
this.dropmenuobj.style.left=this.dropmenuobj.style.top="-500px"
if (e.type=="click" && obj.visibility==hidden || e.type=="mouseover")
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, menuNum){
if (this.dropmenuobj!=null) //hide previous menu
this.dropmenuobj.style.visibility="hidden"
this.clearhidemenu()
cssdropdown.resetmenuall();
if (this.ie||this.firefox){obj.onmouseout=function(){cssdropdown.delayhidemenu(); }
this.menuSelect = menuNum;
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, "visible", "hidden");
this.dropmenuobj.x=this.getposOffset(obj, "left")
this.dropmenuobj.y=this.getposOffset(obj, "top")
this.dropmenuobj.style.left=this.dropmenuobj.x-this.clearbrowseredge(obj, "rightedge")+"px"
this.dropmenuobj.style.top=this.dropmenuobj.y-this.clearbrowseredge(obj, "bottomedge")+obj.offsetHeight+1+"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);
},

swapmenu:function(){
	if (this.menuSelect==1) {changeImages('products', 'images/menu_gifs/productsG.gif');changeImages('metals', 'images/menu_gifs/metalsO.gif');changeImages('mfg_process', 'images/menu_gifs/mfgprocessO.gif');changeImages('handbook', 'images/menu_gifs/wiremeshO.gif'); changeImages('mounting', 'images/menu_gifs/mountingO.gif');}
	if (this.menuSelect==2) {changeImages('metals', 'images/menu_gifs/metalsG.gif'); changeImages('products', 'images/menu_gifs/productsO.gif'); changeImages('mfg_process', 'images/menu_gifs/mfgprocessO.gif'); changeImages('handbook', 'images/menu_gifs/wiremeshO.gif'); changeImages('mounting', 'images/menu_gifs/mountingO.gif');}
	if (this.menuSelect==3) {changeImages('mfg_process', 'images/menu_gifs/mfgprocessG.gif'); changeImages('products', 'images/menu_gifs/productsO.gif'); changeImages('metals', 'images/menu_gifs/metalsO.gif'); changeImages('handbook', 'images/menu_gifs/wiremeshO.gif'); changeImages('mounting', 'images/menu_gifs/mountingO.gif');}
	if (this.menuSelect==4) {changeImages('handbook', 'images/menu_gifs/wiremeshG.gif');changeImages('products', 'images/menu_gifs/productsO.gif'); changeImages('metals', 'images/menu_gifs/metalsO.gif'); changeImages('mfg_process', 'images/menu_gifs/mfgprocessO.gif'); changeImages('mounting', 'images/menu_gifs/mountingO.gif');}	
	if (this.menuSelect==5) {changeImages('mounting', 'images/menu_gifs/mountingG.gif'); changeImages('handbook', 'images/menu_gifs/wiremeshO.gif');changeImages('products', 'images/menu_gifs/productsO.gif'); changeImages('metals', 'images/menu_gifs/metalsO.gif'); changeImages('mfg_process', 'images/menu_gifs/mfgprocessO.gif');}	
},

resetmenuall:function(){
	changeImages('products', 'images/menu_gifs/productsO.gif');
	changeImages('metals', 'images/menu_gifs/metalsO.gif');
	changeImages('mfg_process', 'images/menu_gifs/mfgprocessO.gif');
	changeImages('handbook', 'images/menu_gifs/wiremeshO.gif');	
	changeImages('mounting', 'images/menu_gifs/mountingO.gif');	
},

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