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if (document.images)
{
  preload_image_object = new Image();
  // set image url
  image_url = new Array();
  image_url[0] = "./gr/homeR.jpg";
  image_url[1] = "./gr/aboutR.jpg";
  image_url[2] = "./gr/portfolioR.jpg";
  image_url[3] = "./gr/links.jpgR";

   var i = 0;
   for(i=0; i<=3; i++) 
	 preload_image_object.src = image_url[i];
}
//-->

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;