function addEvent(elm, evType, fn, useCapture)
{
	if (elm.addEventListener) {
		elm.addEventListener(evType, fn, useCapture);
		return true;
	}else if (elm.attachEvent) {
	 var r = elm.attachEvent('on' + evType, fn);
	 return r;
	} else {
		elm['on' + evType] = fn;
	}
}

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