Code: Select all
<script type="text/javascript">
function calculate_remainder()
{
var first_number = window.document.form1.fNumber.value;
var second_number = window.document.form1.sNumber.value;
var remainder_number;
remainder_number = first_number - second_number;
window.document.form1.remainder.value = remainder_number;
}
/* */
</script>
<form action="" method="post" name="form1" >
First value : <input type="text" name="first_number" id="fNumber" />
<br />
Second value : <input type="text" name="second_number" id="sNumber" />
<br />
Remainder of value 1 - value 2<input type="text" name="remainder" id="remainder" value=""
onFocus="calculate_remainder();" />
<br />
<input type="submit" name="btn" value="Go" />
</form>