// JavaScript Document
var dom = document.getElementById;
var ie4=document.all&&navigator.userAgent.indexOf("Opera")==-1;
var ns6=document.getElementById&&!document.all;
var ns4=document.layers;
var VISIBLE = "visible";
var HIDE = (ie4||ns6)? "hidden" : "hide";
var selectContainer = document.getElementsByTagName("SELECT");		


function changeImg(imgname,largeImg){
	document.getElementById("mainimg").src = imgname.src;
	document.getElementById("itemimage").src = largeImg.src;
}

function showLayer(obj){
	for(i=0; i<selectContainer.length; i++)
		selectContainer[i].style.visibility = HIDE;
	if(dom || ie4 || ns6)
			obj.style.visibility = VISIBLE;
			obj.style.display = "";
			document.getElementById("mask").style.filter="alpha(opacity=50)";
			document.getElementById("mask").style.background="#000000";
			var screenwidth=document.body.clientWidth;
			var screenheight=document.body.scrollHeight;
			document.getElementById("mask").style.width=screenwidth;
			document.getElementById("mask").style.height=screenheight;
		//	document.getElementById("itemimage").width = 400;
		//	document.getElementById("itemimage").height =450;
}

function hideLayer1(obj){
	for(i=0; i<selectContainer.length; i++)
		selectContainer[i].style.visibility = VISIBLE;
	if(dom || ie4 || ns6)
        obj.style.visibility = HIDE;
		obj.style.display = "none";
		document.getElementById("mask").style.filter="alpha(opacity=100)";
		document.getElementById("mask").style.background="transparent ";
		document.getElementById("mask").style.width="0";
}