function externalLinks() {
 if (!document.getElementsByTagName) return;
 var anchors = document.getElementsByTagName("a");
 for (var i=0; i<anchors.length; i++) {
   var anchor = anchors[i];
   if (anchor.getAttribute("href") &&
       anchor.getAttribute("rel") == "external")
     anchor.target = "_blank";
 }
}
window.onload = externalLinks;


//referrer page
function start() {
 var ref = document.getElementById('referrer');
 ref.value = document.referrer;
 }
 onload = start; 




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';}