var agt = navigator.userAgent.toLowerCase();
var ns4 = (document.layers) ? true:false;
var ie4 = (document.all) ? true:false;
var ns6 = ((agt.indexOf('netscape6' )>0) && (document.getElementById)) ? true:false;
var ns7 = ((agt.indexOf('netscape/7')>0) && (document.getElementById)) ? true:false;
var fox = ((agt.indexOf('firefox/')>0)) ? true:false;

function swapImage(imgname, image)	{
	if (ns4) document.images[imgname].src = image;
	else if (ie4 || ns6 || ns7) document.images[imgname].src = image;
}

function showlayer(layerobj)
{
	if (ns4){
		if(document.layers[layerobj])
			document.layers[layerobj].visibility = "show";
	}
	else if (ie4){
		if(document.all[layerobj])
			document.all[layerobj].style.visibility = "visible";
	}
	else if (ns6 || ns7){
		if(document.getElementById(layerobj))
			document.getElementById(layerobj).style.visibility = "visible";
	}
}

function hidelayer(layerobj)
{
	if (ns4){
		if(document.layers[layerobj])
			document.layers[layerobj].visibility = "hide";
	}
	else if (ie4){
		if(document.all[layerobj])
			document.all[layerobj].style.visibility = "hidden";
	}
	else if (ns6 || ns7){
		if(document.getElementById(layerobj))
			document.getElementById(layerobj).style.visibility = "hidden";
	}
}

function movelayer(layerobj,top)
{
	if (ns4) document.layers[layerobj].top = top
	else if (ie4) document.all[layerobj].style.top = top
	else if (ns6 && ns7) document.getElementById(layerobj).style.top = top
}

function layerWrite(id,nestref,text)
{
	if (ns4) {
		var lyr = (nestref)? eval('document.'+nestref+'.document.'+id+'.document') : document.layers[id].document
		lyr.open()
		lyr.write(text)
		lyr.close()
	}
	else if (ie4) document.all[id].innerHTML = text;
	else if (ns6 || ns7) document.getElementById(id).innerHTML = text;
}

function onclickVendorImage(name,imgname,num, ht)
{
	var winImage, url, wid;
	wid=535;
	if(num == 1)
		wid = 280;	
	url='vendor_photos.asp?name='+escape(name)+'&img='+imgname+'&pics='+num;
	winImage = window.open(url, 'newWin', 'width='+wid+', height='+ht+', toolbar=no, location=no, resizable=no, scrollbars=no');
	winImage.focus();
}