ColdFusion and Javascript not working

I have the form where I have a pair of checkboxes. 1 to insert another to verify. For example, if there are three line items, there are three checkboxes for the insert and then three checkboxes for the verify. My task is I can only submit the form if both checkboxes are checked otherwise through the error message. I have a little code. But does not seems to be working. What am I doing wrong?

<cfset lcount = #getCareManagers.recordcount#>

<script language="javascript">

function validate(){ var i; var valueDel; var valueEdit;       for (i = 1; i < <cfoutput>#lcount#</cfoutput>; i++)      {      var valueDel = document.getElementById('ins_'+i).checked;      var valueEdit = document.getElementById('verify_'+i).checked;           //alert (valueDel);                       if(valueDel==true && valueEdit==true)           {                     alert(valueDel);                document.forms.frmCheck.submit();                           }      } alert('error, cannot be both checked');                return false; } </script>

<form name="frmCheck" action="checkCompletion.cfm" method="post">

<input type="checkbox" name="ins_#currentrow#" id="ins_#currentrow#"  <cfif isDate(checkCompletion.completiondate)>disabled="disabled" class="green" checked</cfif>/>

<input type="checkbox" name="verify_#currentrow#" id="verify_#currentrow#" <cfif isDate(checkCompletion.completiondate)>disabled="disabled" class="green" checked</cfif>/>

<input type="submit" name="btnSubmit" id="btnSubmit" value="Complete The Course" onclick="validate ();"/>

</form>