calculating and comparing totals

[wbodger]

OK, I have this script in an ASP (classic) page

	<script language="JavaScript" type="text/javascript">
	function calculate(el)
	{
		var form = el.form;
		var xsmall = Number(form.elements["xsmall"].value );
		var small = Number(form.elements["small"].value );
		var medium = Number(form.elements["medium"].value );
		var large = Number(form.elements["large"].value );
		var xlarge = Number(form.elements["xlarge"].value );
		var xxlarge = Number(form.elements["xxlarge"].value );
		var total = xsmall + small + medium + large + xlarge +xxlarge;
		  
		// Check for user entry errors
		if (isNaN(total)) {
			// Alert user of error
			alert("Please enter only numbers");
		} else {
			// Show total in the form field, and select the form field text
			form.elements["total"].value = total;
			//form.elements["total"].select();
		}
	  
	}		
    </script>

which works great. It sums each form field as you go. I also pass in a value in the querystring, called num. Now, I want to warn people that they can't enter a total greater than the number that I have passed in via querystring, so I want to pop up an alert if their total is greater than num, but I am not sure how to do that, so... Any ideas or suggestions how to do this?

Thanks,
Willie

 

[vacunita]

Your JS above only sets a form element with the name of Total to your some.

1. You want to prevent them from changing that?

or

2. You want your ASP to check when it processes the form ?

or

3. You want to compare he Total in the form element to the one in the query string before submitting the form?


For 1. set the total element to be read only.

for 2. ask in asp forum.

For 3. We need to know how you are setting the query string.

----------------------------------
Phil AKA Vacunita
----------------------------------
Ignorance is not necessarily Bliss, case in point:
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Behind the Web, Tips and Tricks for Web Development.

http://behindtheweb.blogspot.com/

 

[wbodger]

Hmm... perhaps option #2 would be best. I will pursue that route for now. Thanks for helping me clarify, Phil.

wb