Validate checkbox In javascript

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Hello Experts,
I have a Register page in which a terms and condition section is present Inside Wizard control which contain a checkbox.It must be checked when user click the next button of wizard.Otherwise it will show a message please check terms & condition.I have tried the following script but it isnot working for wizard control

XML

<SCRIPT type="text/javascript">
<!--
//Accept terms & conditions script (by InsightEye www.insighteye.com)
//Visit JavaScript Kit (http://javascriptkit.com) for this script & more.
function checkCheckBox(f){
if (f.ctl00_ContentPlaceHolder1_Wizard2_chkAgree.checked == false)
{
alert('Please check the box to continue.');
return false;
}else
return true;
}
//-->
</SCRIPT>

Please provide me the solution
Thank You
Sandeep (Software Developer)

Posted 29-Jan-11 0:10am

Sandeepost

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Comments

Sunasara Imdadhusen 29-Jan-11 6:20am

I think f.ctl00_ContentPlaceHolder1_Wizard2_chkAgree it return NULL please try to following in Alert box
alert(f.ctl00_ContentPlaceHolder1_Wizard2_chkAgree)
and let me know what will be Alert box value?

1 solution

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Sunasara Imdadhusen · Accepted Answer · 2011-01-29T00:22:00

Solution 1

Please use following

C#

function checkCheckBox(){
var chk = document.getElementById('<%=chkAgree.ClientID%>');
  if (chk.checked == false)
  {
     alert('Please check the box to continue.');
     return false;
  }
  else
    return true;
}

Thanks,
Imdadhusen

Updates Note:-
I have removed parameter from function because now it is no more nedded!

C#

function checkCheckBox()

Posted 29-Jan-11 0:22am

Sunasara Imdadhusen

Updated 2-Feb-11 2:39am

v2

Comments

Sandeepost 31-Jan-11 1:27am

Thank You very much sir
It is working fine now

sapien4u 1-Feb-11 4:21am

It helped in my case too.
thank you

Sunasara Imdadhusen 2-Feb-11 8:36am

Thanks for your applications!!

If you would getting solution then you should provide Vote and Mark as Accepted Solution.

Sunasara Imdadhusen 2-Feb-11 8:40am

I have also update answer because i removed parameter from function because it was no more needed!