ng5 = (document.getElementById) ? true:false
	ns4 = (document.layers) ? true:false
	ie4 = (document.all) ? true:false 
		
	function themeSwap(currentDiv) {
	var div1 = "tabs1";
	var div2 = "tabs2";
	var div3 = "tabs3";
	var div4 = "tabs4";		
	var x = 1;
	var y = 4;	

	if (ng5) {
		for (x=1;x<=y;x++) {
			var thisDiv = eval("div" + x);
			if (thisDiv == currentDiv){ 
				document.getElementById(thisDiv).style.display = "block";
			} 
			else {
				document.getElementById(thisDiv).style.display = "none";
			}
		}
	} 
	else if (ns4) {
		for (x=1;x<=y;x++){
			var thisDiv = eval("div" + x);
			if (thisDiv = currentDiv){ 
				document.layers[thisDiv].visibility = "show";
			} 
			else {
				document.layers[thisDiv].visibility = "hidden";
			}
		}
	} 
	else if (ie4) {
		for (x=1;x<=y;x++){
			thisDiv = eval("div" + x);
			if (thisDiv = currentDiv){ 
				document.all[thisDiv].style.display = "block";
			} 
			else {
				document.all[thisDiv].style.display = "none";
			}
		}
	}	
	}