Just spent far too long trying to figure out how to do this, so I thought I'd
pass it on to you great guys, in case you need it for the future.
I used PHP to create multiple form rows, each one numbered:
<?
for ($i =1; $i <= 20; $i++) {
echo("<input type=text name=userId$i maxlength=5/><br/>");
}
?>
This creates a number of rows, each with a unique form value name. The problem
I had was that I needed to validate those rows, to make sure they were
numeric... Here's what I did. Have fun!
<?php
$numRows = 20;
?>
<html>
<head>
<title>User ID Entry Example</title>
<script language="JavaScript">
function isNumeric(strString)
{
var strValidChars = "0123456789-.";
var strChar;
var blnResult = true;
if (strString.length == 0) return false;
// test strString consists of valid characters listed above
for (i = 0; i < strString.length && blnResult == true; i++)
{
strChar = strString.charAt(i);
if (strValidChars.indexOf(strChar) == -1)
{
blnResult = false;
}
}
return blnResult;
}
function validateForm()
{
for (var i = 1; i <= <?= $numRows ?>; i++)
{
var fieldName = 'UserId' + i;
var fieldValue =
document.forms.userForm.elements[fieldName].value;
if (fieldValue != '' && ! isNumeric(fieldValue))
{
alert("Field value in row " + i + " (" + fieldValue + ") is
not numeric.");
return false;
}
}
return true;
}
</script>
</head>
<body>
<form name="userForm" action="process_form.php" method="post" onSubmit="return
validateForm()">
<?php
for ($i =1; $i <= $numRows; $i++) {
echo("<input type=text name=userId$i maxlength=5/><br/>");
}
?>
</form>
</body>
</html>
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