让IE8和IE9支持eWebEditor在线编辑器的方法

 function BtnMouseUp() {
    if (event.srcElement.tagName != "IMG") {
        event.cancelBubble = true;
        return false;
    }

    var image = event.srcElement;
    var element = image.parentElement;

    try{
        if (element.YUSERONCLICK) eval(element.YUSERONCLICK + "anonymous()");
    }
    catch(e){
        if (element.YUSERONCLICK) eval(element.YUSERONCLICK + "onclick(event)");
    }

    element.className = "BtnMouseOverUp";
    image.className = "Ico";

    event.cancelBubble = true;
    return false;
}