function menu(img_name1, img_src1, img_name2, img_src2, img_name3, img_src3)
   {
   document[img_name1].src = img_src1;
   document[img_name2].src = img_src2;
   document[img_name3].src = img_src3;
   }

week1 = new Image();
week1.src = "onel.gif";
week2 = new Image();
week2.src = "twol.gif";
week3 = new Image();
week3.src = "threel.gif";
week4 = new Image();
week4.src = "fourl.gif";
week5 = new Image();
week5.src = "fivel.gif";
week6 = new Image();
week6.src = "sixl.gif";
week7 = new Image();
week7.src = "sevenl.gif";
week8 = new Image();
week8.src = "eightl.gif";
week9 = new Image();
week9.src = "ninel.gif";
week10 = new Image();
week10.src = "tenl.gif";
week11 = new Image();
week11.src = "elevenl.gif";
week12 = new Image();
week12.src = "twelvel.gif";
week13 = new Image();
week13.src = "thirteenl.gif";
week14 = new Image();
week14.src = "fourteenl.gif";
week15 = new Image();
week15.src = "fifteenl.gif";

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;