如果用JavaScript来控制动作

Question

<script language="javascript">
function check()
{
if(screen.availwidth==800)
   window.location="a.htm"
else
   window.location="b.htm"
}
setTimeout("check()",3000)
</script>

Answer 1

<script language="javascript">
if (window.screen){
  var widths = screen.width;
  url_640 = "default640.htm";
  url_800 = "default800.htm";
  url_1024 = "default1024.htm";
  if(widths<740){
    window.setTimeout("self.location.replace(url_640);",3000)
  }
  if(widths>=740 & w<835){
    window.setTimeout("self.location.replace(url_800);",3000)
  }
  if(widths>=835){
     window.setTimeout("self.location.replace(url_1024);",3000)
  }
}
</script>