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Javascript with PHP


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  #1  
Old June 16th, 2000, 11:43 AM
RayRay RayRay is offline
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I want to check the empty text in the form with javascript and php. What's wrong in this program? How to solve it? Thanks!

<html>
<script language="javascript">
<!--

option_desc=new makearray(<? echo $num-1; ?> );

function checkform() {

<?
for ($i=0; $i<$num; $i++) {
?>
if (document.poll_form.option_desc[<? echo $i; ?>].value=="") {
alert("Text<? echo $i+1; ?> is empty.");
document.poll_form.option_desc[<? echo $i; ?>].focus();
return false;
}
<?
}
?>
return true;
}

//-->
</script>

<body>
<form method="post" action="" name="poll_form" onsubmit="return checkform();">
<?
for ($i=0; $i<$num; $i++) {
?>
<p>
<input type="text" name="option_desc[<? echo $i; ?>]" size="50">
</p>
<?
}
?>
<input type="submit" name="submit">
</form>
</body>
</html>

[This message has been edited by RayRay (edited June 16, 2000).]
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  #2  
Old June 16th, 2000, 10:49 PM
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firepages firepages is offline
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The javascript routine is client side - the onSubmit() executes client side before the form is posted and therfore before the values in option_desc[] exist-

if you send the page to itself via the form ,then validation will occur but your validation routine runs before the form is actually submitted. onSubmit() return true; - will only send the form & post the variables if the validation was successful.

If you see what I mean?

Simon

------------------
Simon Wheeler
FirePages -DHTML/PHP/MySQL
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  #3  
Old June 17th, 2000, 06:27 PM
RayRay RayRay is offline
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Now, is the javascript doesn't work. It can't validation the text data.
How to solve it?
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  #4  
Old June 17th, 2000, 11:02 PM
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firepages firepages is offline
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Hi RayRay - listen - apologies my last answer was gibberish - not sure where I was coming from - the form below works!

<html>
<script language="javascript">
<!--
function checkform() {
<?php $num=3;?>
<?
for ($i=0; $i<$num; $i++) {
?>
if (document.poll_form.option_desc<? echo $i; ?>.value=="") {
alert("Text<? echo $i+1; ?> is empty.");
document.poll_form.option_desc<? echo $i; ?>.focus();
return false;
}
<?
}
?>
return true;
}

//-->
</script>
<body>
<form method="post" action="#" name="poll_form" onsubmit="return checkform();">
<?
for ($i=0; $i<$num; $i++) {
?>
<p>
<input type="text" name="option_desc<? echo $i; ?>" size="50">
</p>
<?
}
?>
<input type="submit" name="submit">
</form>
</body>
</html>

The problem was making option_value[] a javascript array - Now it is a PHP one and it works fine!!!!


Still not sure what I was thinking the first time?

Simon


------------------
Simon Wheeler
FirePages -DHTML/PHP/MySQL
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  #5  
Old June 17th, 2000, 11:04 PM
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firepages firepages is offline
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I must be on something today ! -

"The problem was making option_value[] a javascript array - Now it is a PHP one and it works "

option_value is no longer an array of any sort!

------------------
Simon Wheeler
FirePages -DHTML/PHP/MySQL
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  #6  
Old June 18th, 2000, 02:59 AM
RayRay RayRay is offline
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Thank you very much!
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