Select box, form validations

[newbby]

Hi,
Please help me figure, how to write this form validations in javascript.
when a user selects the value "ON" from a select drop down list,
I have to figure that the sum of all the intWorkDone should be <=200.

<form action="update.cfm" method="post">

<cfoutput>
<cfloop from="1" to="#queryName.recordcount#" index="i">

<input type="text" name="StrName" value="#queryName.Name#">

<select name="strSelect">
<option value="ON">ON
<option value="OFF">OFF
</select>

<input type="text" name="intWorkDone" value="#queryName.WorkValue">

<input type="submit" name="" value="Update">

</cfloop>
</cfoutput>
</form>

Thanks

 

[vladibo]

<form action="update.cfm" method="post">
<script>
function SubmitForm(){
var sum = 0;
var i = 1;
var obj = document.getElementById("WorkDone_"+i);
while(obj){
i++;
sum += obj.value;
obj = document.getElementById("WorkDone_"+i);
}
if(sum < 200){
alert('Sum must be more than 200');
return false;
}else document.forms[0].submit();
}
</script>


<cfoutput>
<cfloop from="1" to="#queryName.recordcount#" index="i">

<input type="text" name="StrName" value="#queryName.Name#">

<select name="strSelect">
<option value="ON">ON
<option value="OFF">OFF
</select>

<input id="WorkDone_#i#" type="text" name="intWorkDone" value="#queryName.WorkValue">

<input type="button" name="" value="Update" onclick="SubmitForm()">

</cfloop>
</cfoutput>
</form>

 

[newbby]

Thanks vladibo for the solution. I need to sum only those intWorkDone records, where the strSelect= ON. Your solution is missing that catch.