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<form>
<input type="text" name="field1" value="15">
<input type="text" name="field2" value="16">
<input type="text" name="field3" value="1">
<input type="text" name="field4" value="52">
<input type="button" value="Sum" onClick="sum(this.form)">
</form>
<script language="JavaScript"><!--
function sum(objRef) {
var result = 0;
result =+ objRef.field1.value - 0;
result =+ objRef.field2.value - 0;
result =+ objRef.field3.value - 0;
result =+ objRef.field4.value - 0;
alert(result);
}
//--></script>Ray Pooley writes:
Use parseInt() or parseFloat() methods to assign the form text variables to numeric variables and perform your maths on the new variables. eg: numvar = parseFloat(formelementvalue); If formelementvalue contains '30.1' then numvar will be equal to 30.1 numeric.