math in forms

darinchenry · May 7, 2002

I'm making a form in my web site that requires simple addition and multiplication. How can I apply some kind of math script to certiain input fields in my form.For instance if the product field =$10 and the quantity field=5, if you push a button that i've made called calculate, how can i make it read and post $50 in the total field. Thank you in advance for any help---Darin

sweevo · May 8, 2002

You'll have to use some client-side scripting, either (reccommended) Javascript or VBScript. As a quick example:

<html>
<head>
<title>Untitled</title>
<script>
function maths(val1, val2) {
frmTest.txtOutput.value = (val1 * val2);
}
</script>
</head>
<body>
<form name="frmTest">

Value 1: <input type="text" name="txtVal1"><br>
Value 2: <input type="text" name="txtVal2">

<input type="button" name="Equals" value="Equals"
onClick="maths(frmTest.txtVal1.value, frmTest.txtVal2.value);"><br>

Output: <input type="text" name="txtOutput">

</form>
</body>
</html>

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math in forms

darinchenry

Technical User

sweevo

Programmer

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