控制form中两个check不能同时选择
<form   name= "form1 "   method= "post "   action= "aaaa.asp ">  
  <input   name= "cancel_time "   type= "checkbox "   id= "cancel_time ">  
 是否改截止时间 
  <input   name= "cancel_time2 "   type= "checkbox "   id= "cancel_time2 ">  
 是否改截止日期时间 
  <input   type= "button "   name= "Button "   value= "      更   新    "   class= "crystal "   onClick= "javascript:submit_confirm(); ">  
  </form>    
    function   submit_confirm()   { 
       if(form1.endcancal_time.checked==true   &&form1.endcancal_time2.checked==true){ 
                alert( "“是否改截止日期”和“是否改截止日期时间”不能同时选择! "); 
             return   false;    
                               } 
       else 
       { 
                document.form1.submit(); 
          } 
    }   
 endcancal_time和endcancal_time2可以同时不选,可以任选一个,但不能同时选,我用上面的函数控制,没起到作用,请大家指点一下
------解决方案-------------------- <form action= " " method= "post " name= "form1 ">  
          <input id= "cancel_time " name= "cancel_time " type= "checkbox ">  
         是否改截止时间 
          <input id= "cancel_time2 " name= "cancel_time2 " type= "checkbox ">  
         是否改截止日期时间 
          <input class= "crystal " name= "Button " onclick= "javascript:submit_confirm(); " type= "button " 
             value= " 更 新  ">  
      </form>  
      <script>  
     function submit_confirm() { 
         if(document.getElementById( 'cancel_time ').checked == true && document.getElementById( 'cancel_time2 ').checked == true){ 
             alert( "“是否改截止日期”和“是否改截止日期时间”不能同时选择! "); 
             return false; 
         } 
         else 
         { 
             document.form1.submit(); 
         } 
     } 
      </script>
------解决方案--------------------不管需求了,LZ 自己看着办,写个通用的   
 L@_@K     
  <!DOCTYPE html PUBLIC  "-//W3C//DTD XHTML 1.0 Transitional//EN "  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd ">  
  <html xmlns= "http://www.w3.org/1999/xhtml ">  
   <head>  
    <title> selecte single checkbox </title>  
    <meta name= "generator " content= "editplus " />  
    <meta name= "author " content= "yixianggao " />  
    <meta name= "keywords " content= "javascript " />  
    <meta name= "description " content= "for csdn " />  
   </head>    
   <body>  
    <form name= "form1 " method= "post " action= "aaaa.asp ">  
      <h4> 根本无需脚本!杀鸡焉用牛刀! </h4>  
      <input type= "radio " name= "modifyList " id= "radOption1 ">  <label FOR= "radOption1 "> 是否改截止时间 </label>  
      <input type= "radio " name= "modifyList " id= "radOption2 ">  <label FOR= "radOption2 "> 是否改截止日期时间 </label>  <br />  <br />  
      <h4> 用一下下牛刀!