function pencereAc(sUrl) {
//    var dialogFeatures =
//  'center:yes; dialogWidth:350px; dialogHeight:300px; edge:raised; ' +
//  'help:no; resizable:no; scroll:no; status:no;';

//    dialogResults = window.showModalDialog(sUrl, null, dialogFeatures);
    var width = 350;
    var height = 300;
    var left = parseInt((screen.availWidth / 2) - (width / 2));
    var top = parseInt((screen.availHeight / 2) - (height / 2));
    var windowFeatures = "location=no, menubar=no, status=no, toolbar=no, scrollbars=no, resizable=no, width=" + width + ",height=" + height + ",left=" + left + ",top=" + top + "screenX=" + left + ",screenY=" + top;
    myWindow = window.open(sUrl, "pencere", windowFeatures);
}