function toggleLayer( whichLayer ) {
	
	var elem, vis;

	for (i=0;i<=4;i=i+1) {
		
		if (whichLayer==('articles'+i)) {
			
			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(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';
			vis.display = 'block';

		} else {
			
			if( document.getElementById ) {
				elem = document.getElementById( 'articles'+i );
			} else if( document.all ) {
				elem = document.all['articles'+i];
			} else if( document.layers ) {
				elem = document.layers['articles'+i];
			}
			
			vis = elem.style;

			if(vis.display==''&&elem.offsetWidth!=undefined&&elem.offsetHeight!=undefined) {
				vis.display = (elem.offsetWidth!=0&&elem.offsetHeight!=0)?'block':'none';
			}
			
			vis.display = 'none';
		}
	}
}

function toggleCss() {
	var oLink = document.createElement("link")
	oLink.href = "mypath/mycss.css";
	oLink.rel = "stylesheet";
	oLink.type = "text/css";
	document.body.appendChild(oLink);
}