还有人吗？急问！！！！！！！！！！！请各路英雄帮忙

Question

 switch (user_for)
     {
         case "1":
                 }

Answer 1

<script language="javascript">
function action_to()
{
    var user_for;
    user_for = document.getElementById("yongto").value;
    alert(user_for);
     switch (user_for)
     {
         case "1":
             Search_form.action = "chuzu_index.asp";
             break;
         case "2":
             Search_form.action = "chuzu_index_1.asp";
             break;
         case "3":
             document.Search_form.action = "chushou_index.asp";
             break;
         default:
             document.Search_form.action = "chuzu_index.asp";
             break;
     }
 }   
</script><form name="Search_form" action="" method="get" style="margin-top: 0; margin-bottom: 0"> 
<input type="text" id="yongto" value="1"> 
<img border="0" src="images/search_b2.gif" width="84" height="22" onClick="action_to();" style="cursor:hand;"> </form>