how can I add these numbers as numbers and not strings

[sKunKbad]

I'm trying to putput a number that is added, but it is instead combining strings:

 

<script type="text/javascript">
function calculate_totals()
{
		$section1_total = 0;
		for (i = 0; i < 3; i++){
			if (document.form_8.I_Irregular_menstrual_cycle[i].checked == true)
			{
				$section1_total += document.form_8.I_Irregular_menstrual_cycle[i].value;
			}
		}
		for (i = 0; i < 3; i++){
			if (document.form_8.I_Water_retention[i].checked == true)
			{
				$section1_total += document.form_8.I_Water_retention[i].value;
			}
		}
		document.form_8.section1_total.value = $section1_total;
		return;
}
</script>

<form name="form_8" id="form_8" action="examine-post.php" method="post" onSubmit="calculate_totals();">

<input type="radio" id="a1" name="I_Irregular_menstrual_cycle" VALUE="5">
<input type="radio" id="a2" name="I_Irregular_menstrual_cycle" VALUE="66">
<input type="radio" id="a3" name="I_Irregular_menstrual_cycle" VALUE="777">
<input type="radio" id="b1" name="I_Water_retention" VALUE="5">
<input type="radio" id="b2" name="I_Water_retention" VALUE="66">
<input type="radio" id="b3" name="I_Water_retention" VALUE="777">

<input type="hidden" name="section1_total" value="" />
<input type="submit" value="submit" />
</form>

[miancu]

try using parseInt() for the value in the form.

Hope this helps!

[sKunKbad]

Thanks... works perfectly!