双击网页链接或图片,弹出保存图片的对话框,

<a href="gb.html" onclick="save()">保存</a>
<SCRIPT LANGUAGE="JavaScript">
function save()
{
  var e = window.event.srcElement;
  if(e.tagName=="A")
  {
    var win=window.open(e.href, "_blank", "top=1200px,left=1200px");
    win.document.execCommand('SaveAs');
    win.opener=null;
    win.close();
    event.returnValue=false;
  }
}
</SCRIPT>

<img src="images/arrow.gif">
<SCRIPT LANGUAGE="JavaScript">
document.ondblclick = function()
{
  var e = window.event.srcElement;
  if(e.tagName=="IMG")
  {
    var win=window.open(e.src, "_blank", "top=1200px,left=1200px");
    win.document.execCommand('SaveAs');
    win.opener=null;
    win.close();
  }
}
</SCRIPT>