window.onload = rolloverInit;

function rolloverInit()
  {
	    for (var i=0; i<document.images.length; i++)
	     {
		     if (document.images[i].parentNode.tagName == "B")
		     	{
			     		setupRollover(document.images[i]);
		   		}
	   	}
  }

function setupRollover(thisImage)
	{
		thisImage.outImage = new Image();
		thisImage.outImage.src = thisImage.src;
		thisImage.onmouseout = rollOut;
		
		thisImage.overImage = new Image();
		thisImage.overImage.src = "rolllinks/" + thisImage.id + "_on.png";
		thisImage.onmouseover = rollOver;
	}

function rollOver()
	{
		this.src = this.overImage.src;
	}
	
function rollOut()
	{
		this.src = this.outImage.src;
	}