if (parseInt(navigator.appVersion)>3) {
 if (navigator.appName=="Netscape") {
  winW = window.innerWidth;
  winH = window.innerHeight;
 }
 if (navigator.appName.indexOf("Microsoft")!=-1) {
  winW = document.body.offsetWidth;
  winH = document.body.offsetHeight;
 }
}

isIE=document.all;
isNN=!document.all&&document.getElementById;
isN4=document.layers;


function divlink(thelink) {
 newlinks = '<b><a href="' + thelink + '" target="_blank" onclick="ExtCancel();"><img src="images/externallink/b_yes.gif" border=0></a></b>'+
	           '&nbsp;&nbsp;&nbsp;<b><a href="javascript:ExtCancel();"><img src="images/externallink/b_no.gif" border=0></a></b>';
 document.getElementById("links").innerHTML = newlinks;
}

function ExtCancel(){
  if (isIE||isNN) { 
		document.getElementById("theLayer").style.visibility="hidden";
  document.getElementById("overlay").style.visibility="hidden";}
  else if (isN4) {
		document.theLayer.visibility="hide";
		document.overlay.visibility="hide";}
}

function ExtLink(lnk){
  if (isIE||isNN) {
		document.getElementById("theLayer").style.visibility="visible";
		document.getElementById("theLayer").style.width = '350px';
		document.getElementById("theLayer").style.left = winW/2.5 + 'px';
		document.getElementById("theLayer").style.top = winH/5 + 'px';
		divlink(lnk);
		document.getElementById("overlay").style.width = screen.width + 'px';
		document.getElementById("overlay").style.height = screen.height + 'px';
		document.getElementById("overlay").style.left = '0px';
		document.getElementById("overlay").style.top = '0px';
		document.getElementById("overlay").style.visibility="visible";
		}
  else if (isN4) {
		document.theLayer.visibility="show";
		document.theLayer.width = '350px';
		document.theLayer.left = winW/2.5 + 'px';
		document.theLayer.top = winH/4 + 'px';
		divlink(lnk);
		document.overlay.width = screen.width + 'px';
		document.overlay.height = screen.height + 'px';
		document.overlay.left = '0px';
		document.overlay.top = '0px';
		document.overlay.width = '350px';
 	document.overlay.visibility="show";}
}