2008-01-08

javascript全选及取值

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
 <head>
  <title>checked.html</title>

  <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
  <meta http-equiv="description" content="this is my page">
  <meta http-equiv="content-type" content="text/html; charset=gb2312">

  <!--<link rel="stylesheet" type="text/css" href="./styles.css">-->

  <script type="text/javascript">
    function checkAll(str){
     var a = document.getElementsByName(str);
     var n = a.length;    
 
 for(var i=0;i<n;i++){
      a[i].checked = window.event.srcElement.checked;
     }
    }  

function checkItem(str){
     var e = window.event.srcElement;
     var all = eval("document.f1."+str);
     if(e.checked){
      var a = document.getElementsByName(e.name);
      all.checked = true;
      for(var i=0;i<a.length;i++){
       if(!a[i].checked){
        all.checked = false;
        break;
       }
      }
     }else{
      all.checked = false;
     }
    }

	function getInfo(){
		var uid='';
		var obj=document.all('mm');
		for(var i=0; i < obj.length; i++){
			 if(obj[i].checked)
					uid +=obj[i].value + ',';
		   }
		alert(uid);
	}
  </script>
 </head>

 <body>
  <form name="f1" id="f1" action="" method="post">
  
   <input type="checkbox" value="e1" name="mm" onclick="checkItem('all')">
   <br />
   <input type="checkbox" value="e2" name="mm" onclick="checkItem('all')">
   <br />
   <input type="checkbox" value="e4" name="mm" onclick="checkItem('all')">
   <br />
   <input type="checkbox" value="e5" name="mm" onclick="checkItem('all')">
   <br />
   <input type="checkbox" value="e6" name="mm" onclick="checkItem('all')">
   <br />
   <input type="checkbox" value="e7" name="mm" onclick="checkItem('all')">
   <br />
	 <input type="checkbox" name="all" onclick="checkAll('mm')">
   全选
    <input type="button" name="all" value="测试" onclick="getInfo()">
   <br />
  </form>
 </body>
</html>
 
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