Question

How do you check that the user has put in only numerical values if you are using the jquery validate plugin on a field?

<script>   
$(document).ready(function() {
$("#form1").validate();}); 
</script>
<form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post" name="form1" id="form1" class="form1">
<input name="Capacity" type="text" id="Capacity" class="required">
<label for="Capacity" class="error">Please specify a capacity</label>
<input type="submit" name="Submit1" value="Search" id="Submit1" />
</form>

Answer 1

You could use the digits() rule or the number() rule if you want to allow decimals.

$("#form1").validate({
    rules: {
        Capacity: {
            digits: true
        }
    }
});