记录一个关于弹出新页面始终在正中央方法

function openwindow(url, name, iWidth, iHeight) {

       var url;                                //转向网页的地址;

       var name;                          //网页名称，可为空;

       var iWidth;                         //弹出窗口的宽度;

       var iHeight;                       //弹出窗口的高度;

       var iTop =(window.screen.availHeight - 30 - iHeight) / 2;      //获得窗口的垂直位置;

       var iLeft =(window.screen.availWidth - 10 - iWidth) / 2;          //获得窗口的水平位置;

       window.open(url, name,‘height=‘ + iHeight +‘,,innerHeight=‘ + iHeight +‘,width=‘ + iWidth +‘,innerWidth=‘ + iWidth +‘,top=‘ + iTop +‘,left=‘ + iLeft +‘,toolbar=no,menubar=no,scrollbars=auto,resizeable=no,location=no,status=no‘);

   }

   function openwindowpage() {

       openwindow("/SitePages/uploadPicture.aspx","添加图片","500","480");

    }