startList = function() {
getImage();
if (document.all&&document.getElementById) {
navRoot = document.getElementById("nav");
for (i=0; i<navRoot.childNodes.length; i++) {
node = navRoot.childNodes[i];
if (node.nodeName=="LI") {
node.onmouseover=function() {
this.className+=" over";
  }
  node.onmouseout=function() {
  this.className=this.className.replace
        (" over", "");
   }
   }
  }
 }
}
function get_random()

{

    var ranNum= Math.round(Math.random()*2);

    return ranNum;

}

function getImage()

{

   var img=get_random();

 

    var arrImages=new Array(3)

     arrImages[0]="mainpic-1.jpg";

             arrImages[1]="mainpic-2.jpg";

             arrImages[2]="mainpic-3.jpg";
  

   //alert(arrImages[img]);
if (document.gallery){
   document.gallery.src = "images/" + arrImages[img]
}
 
   
  }

window.onload=startList;