function hiddenVersion(){
        //找当前页面中所有的DIV对象
        var divs = document.getElementsByTagName("div");
        //遍历所有的DIV对象
        for(var i=0;i<divs.length;i++)
        {
            //如果当前DIV内的文本是“Powered By SlickUpload Evaluation Version”就把当前的DIV隐藏起来
            if(divs[i].innerHTML.indexOf("Powered By SlickUpload Evaluation Version")!=-1)
            {
                divs[i].style.display="none";
            }
        }
    }