Coding Forum

**Zork** · 05-22-2004, 12:27 PM

I have a form
<form name="info" action="buyaa.asp">
<input type="text" name="mymoney">
<input type="text" name="price">
</form>

And I want to use javascript to take in the form data and compare it:

var mymoney = (this.. I guess. is were the value for mymoney on the last page would go)
var price = (same as above)
if mymoney<price then
{
blah
}
else
{
blah
}

How would I go about doing this?

Thanks in advance

**ElectricSheep** · 05-22-2004, 01:06 PM

I hope the following code helps. The form will only be submitted to the asp script if the value of mymoney is greater than or equal to the price.

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>
<head>
<title>Validate form</title>
<script language="JavaScript" type="text/javascript">

</script>
</head>
<body>
<form onSubmit="return validate()" name="info" action="buyaa.asp">
<table>
<tr><td>Funds</td><td><input type="text" name="mymoney"></td></tr>
<tr><td>Price</td><td><input type="text" name="price"></td></tr>
<tr><td colspan="2"><input type="submit" value="Make Purchase"></td></tr>
</table>
</form>
</body>
</html>

HTH

**Zork** · 02:52 PM

Thanks...

Your script works when not using ASP to insert data into the textboxes, but when I do everything seems backward or just wrong. According to the script, it said 2121212 was less then 300 but great then 500. What could be going wrong here?

After doing some testing, it doesn't work if I have asp insert the value of the textbox. any alternatives?

Thanks for the help,

**Zork** · 02:34 PM

**ElectricSheep** · 05-23-2004, 02:26 PM

I think it may be a data type problem. Amend the condition as follows using the parseFloat method. Let me know how you get on.

if(parseFloat(document.info.mymoney.value)<parseFl oat(document.info.price.value))

HTH