function domRollover() {
	if (!document.getElementById) return;
	var imgTemp=new Array();
	var imgarr=document.getElementsByTagName('img');
	for (i=0;i<imgarr.length;i++){
		if (imgarr[i].getAttribute('hsrc')){
			imgTemp[i]=new Image();
			imgTemp[i].src=imgarr[i].getAttribute('hsrc');
			imgarr[i].setAttribute('xsrc', imgarr[i].getAttribute('src'));
			imgarr[i].onmouseover=function(){
				this.setAttribute('src',this.getAttribute('hsrc'))
			}
			imgarr[i].onmouseout=function(){
				this.setAttribute('src',this.getAttribute('xsrc'))
			}
		}
	}
}

addLoadEvent( domRollover );

domRollover()

function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      oldonload();
      func();
    }
  }
}

function addUnloadEvent(func) {
  var oldonunload = window.onunload;
  if (typeof window.onunload != 'function') {
    window.onunload = func;
  } else {
    window.onunload = function() {
      oldonunload();
      func();
    }
  }
}