JQuery判断radio是否选中，获取选中值

/*---------------------------JQuery判断radio是否选中，获取选中值----------------------------------*/

其他对radio操作功能，以后在添加。直接上代码，别忘记引用JQuery包

<!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> 
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 
<title>JQuery radio</title> 
<script type="text/javascript" language="javascript" src="JavaScript/jquery-1.6.1.min.js" ></script> 
<script type="text/javascript" language="javascript"> 
 /*------判断radio是否有选中，获取选中的值--------*/ 
    $(function(){ 
         $("#btnSubmit").click(function(){ 
            var val=$('input:radio[name="sex"]:checked').val(); 
            if(val==null){ 
                alert("什么也没选中!"); 
                return false; 
            } 
            else{ 
                alert(val); 
            } 
            var list= $('input:radio[name="list"]:checked').val(); 
            if(list==null){ 
                alert("请选中一个!"); 
                return false; 
            } 
            else{ 
                alert(list); 
            }            
         }); 
     }); 
</script> 
</head> 
  
<body> 
<form id="form1" > 
<input type="radio"  name="sex" value="男" />男 
<input type="radio" name="sex" value="女" />女 
<br /> 
<input type="radio"  name="list" value="十分满意" />十分满意 
<input type="radio" name="list" value="满意" />满意 
<input type="radio" name="list" value="不满意" />不满意 
<input type="radio" name="list" value="非常差" />非常差 
<br /> 
<input type="submit" value="submit"  id="btnSubmit" /> 
</form> 
</body> 
</html>