function getChkCode(obj)
{
    document.getElementById(obj).innerHTML="<img src='/CheckCode.aspx?random="+Math.random()+"' style=\"cursor: pointer;\"  alt='点击图片重新加载验证码' width='60' height='23'   onclick='javascript:dogetChkCode("+obj+")' />";
}

function dogetChkCode(obj)
{
    var obj2;
    if(typeof(obj)=="object")
        obj2=obj.id;
    else
        obj=obj;
    document.getElementById(obj2).innerHTML="<img src='/UI/Web/images/loading1.gif' alt=''/>";
    setTimeout("getChkCode('"+obj2+"')",500);
}