点击弹出小窗口的js

function modalDialog(url, name, width, height)
 {
   if (width == undefined)
   {
     width = 400;
   }
   if (height == undefined)
   {
     height = 300;
   }  if (window.showModalDialog)
   {
     window.showModalDialog(url, name, 'dialogWidth=' + (width) + 'px; dialogHeight=' + (height+5) + 'px; status=off');
   }
   else
   {
     x = (window.screen.width - width) / 2;
     y = (window.screen.height - height) / 2;    window.open(url, name, 'height='+height+', width='+width+', left='+x+', top='+y+', toolbar=no, directories=no, status=no, menubar=no, scrollbars=no, resizable=no, modal=yes');
   }
 }