ng5 = (document.getElementById) ? true:false
ns4 = (document.layers) ? true:false
ie4 = (document.all) ? true:false 

function chgImg(imgField,newImg) {
if (document.images) {
	document[imgField].src= eval(newImg + ".src")
	}
}

function showHide(divID){
	if (ng5) {	
		if (document.getElementById(divID).style.display == "none") {
		document.getElementById(divID).style.display = "block";
		} 
		else {
		document.getElementById(divID).style.display = "none";
		}		
	}
	else if (ns4) {	
		if (document.layers[divID].lyr.visibility == "hidden") {
		document.layers[divID].lyr.visibility = "block";
		} 
		else {
		document.layers[divID].lyr.visibility = "hidden";
		}	
	}	
	else if (ie4) {
		if (document.all[divID].lyr.style.display == "none") {
		document.all[divID].lyr.style.display = "block";
		} 
		else {
		document.all[divID].lyr.style.display = "none";
		}	
	}	
}

function openPop(w,h,webaddress,name,scrolls) {
	var winLeft = (screen.availWidth/2)-(w/2);
	var winTop = (screen.availHeight/2)-(h/2);
	var scroll = scrolls;
	var viewimageWin = window.open(webaddress,name,'left='+winLeft+',top='+winTop+',toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars='+scroll+',resizable=yes,copyhistory=no,width='+w+',height='+h);
	viewimageWin.focus();
}