// JavaScript Document

function swapImage(myID, newSrc)
{
	var strOver  = "_hover";
	var strOff = "_up";

	if(typeof myID != 'object')
		var oImg = document.getElementById(myID);
	else
		var oImg = myID;
   
   if(newSrc)
   {
	   oImg.src = newSrc;
	   return;
   }
   
   
	var currImg = oImg.src;

	if (currImg.indexOf(strOver) != -1)
		oImg.src = currImg.replace(strOver,strOff)
	else
		oImg.src = currImg.replace(strOff,strOver)
}