function toggleLayer(whichLayer){
	var elem, vis;
	if(document.getElementById)
		elem = document.getElementById( whichLayer );
	else if(document.all)
		elem = document.all[whichLayer];
	else if(document.layers)
		elem = document.layers[whichLayer];
	vis = elem.style;
	/* if the style.display value is blank we try to figure it out here */
	if(vis.display==''&&elem.offsetWidth!=undefined&&elem.offsetHeight!=undefined)
		vis.display = (elem.offsetWidth!=0&&elem.offsetHeight!=0)?'block':'none';
	vis.display = (vis.display==''||vis.display=='block')?'none':'block';
}

function showMsg(msg){
	document.getElementById("message").innerHTML = msg;
	document.getElementById("message").style.display = 'block';
}

function helpPopup(url,width,height) {
	//alert("called");
	window.open(url,'division','width='+width+',height='+height+',screenX=200,screenY=300,scrollbars=0')
	//alert("called1");
}

function treePopup(url,width,height) {
	//alert("tree called");
	window.open(url,'division','width='+width+',height='+height+',screenX=200,screenY=300')
	//alert("called1");
}

function hidecheckboxes(pcat,ncat){
	//alert("Prev Cat : "+pcat);
	//alert("Prev Cat : "+ncat);
	if(pcat != ncat){
		elem = document.getElementById("checkboxes");
		elem.style.display = 'none';
	} else {
		elem = document.getElementById("checkboxes");
		elem.style.display = 'block';
	}
}