function toggleLayer( whichLayer )
{  
    var elem, vis;  
    if( document.getElementById ) // this is the way the standards work    
        elem = document.getElementById( whichLayer );  
    else if( document.all ) // this is the way old msie versions work      
        elem = document.all[whichLayer];  
    else if( document.layers ) // this is the way nn4 works    
        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 ExternalLinks()
{
	var aLinks = document.body.getElementsByTagName('a');
	var i = 0;
	var oA, oRel;

	while ((oA = aLinks[i++]))
	{
		oRel = oA.getAttribute('rel');
		
		if (oRel && (oRel == 'external'))
		{
			oA.target = '_blank';
		}
	}
	
	oA = oRel = aLinks = null;
}