function IsIE()
{
	return !!(window.attachEvent && !window.opera)
}
function setDisabled(el, disabled){
	if(IsIE())
	{
		el.disabled=disabled;
	}
	else
	{//非IE浏览器中.把onclick等属性挪一下再挪回来
		if(disabled)
		{
			el.__onclick=el.onclick;
			el.onclick=" ";
			el.__onmouseover=el.onmouseover;
			el.onmouseover=" ";
			el.__onmouseout=el.onmouseout;
			el.onmouseout="";
		}
		else{
			if(el.__onclick)
				el.onclick=el.__onclick;
			if(el.__onmouseover)
				el.onmouseover=el.__onmouseover;
			if(el.__onmouseout)
				el.onmouseout=el.__onmouseout;				
		}
		el.disabled=disabled;
	}
}