asp.net - Validate RadioButton List Using Javascript and CustomValidator -

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i using customvalidator radiobuttonlist,instead of requiredfieldvalidator, can assign css class using javascript.the validation check @ least 1 of items selected. foll. code not working:

js:

function validateradiobuttonlist() {                           var target = document.getelementbyid('<%=rbgender.clientid %>');                     var radiobuttons = target.getelementsbytagname('input');             var is_valid;             if (radiobuttons[0].checked || radiobuttons[1].checked) {                 is_valid = true;                 target.classname = "";             }             else {                 target.classname = "validate";                 is_valid = false;             }             args.isvalid = is_valid;         }

aspx: 

 <asp:radiobuttonlist id="rbgender" runat="server" repeatdirection="horizontal"    repeatlayout="flow" autopostback="false">   <asp:listitem>male&nbsp;&nbsp;</asp:listitem>   <asp:listitem>female&nbsp;&nbsp;</asp:listitem>  </asp:radiobuttonlist>  <asp:customvalidator id="customvalidator3" runat="server"    controltovalidate="rbgender" clientvalidationfunction="validateradiobuttonlist"      text="*" forecolor="red"> </asp:customvalidator>   <asp:button id="btnupdate" runat="server" text="update"    validationgroup="vsgroup" />

generated html:

<div class="">  <span id="contentplaceholder1_rbgender">  <input id="contentplaceholder1_rbgender_0" type="radio"    name="ctl00$contentplaceholder1$rbgender" value="male  " />  <label for="contentplaceholder1_rbgender_0">male  </label>  <input id="contentplaceholder1_rbgender_1" type="radio"    name="ctl00$contentplaceholder1$rbgender" value="female  " />  <label for="contentplaceholder1_rbgender_1">female  </label>  </span>  <span style="float: right; margin-right: 3%">  <span id="contentplaceholder1_customvalidator3" style="color:red;   visibility:hidden;">*  </span>  </span> </div>

but if include 

usesubmitbehavior="false" onclientclick="validateradiobuttonlist()"

for button, works. not want so.

try without asp validators. can solved using javascript. try link reference: http://www.felgall.com/javatip2.htm


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