Javascript variables to/from php variables

rscoville

OK, I hit the wall. This oughta be simple, but my head is so sore from banging it against this code that I'm here to try to find a kind soul who's a lot smarter than I am to maybe suggest a solution. Here's the scoop:

I have a series of pages where users sign up for membership on a site.
On each page is a form with a bunch of elements in it. In javascript, I can easily get an array of those elements from document.form1.elements
As the user leaves each page, I post the variables in the php $_SESSION array
If the user backtracks in the page series (not using the 'back' option, but reloads the page), I look at the $_SESSION array, and if there's data there, I reload it into the element
At this point, I have to do this for each element separately.. But I've got these two arrays!... with matching contents!... why can't I iterate through them to do the matching?

Here's the schema for my current code:

<?php if(isset($SESSION('userName')) {
$userName = $SESSION('userName'); }
else {
$userName = "";}
...repeat for each element...}
?>
<head>
<script> function doc_onload(){
document.form1.userName.value = "<?=$userName?>";
... repeat for each element...}
</script>
</head>
<body ... onload="doc_onload()">
<form name=form1 ...>
<input name="userName">
...

What I want to do is iterate through the form elements (in Javascript) and for each one, if there's an element in $_SESSION that matches, set the value. Or maybe the other way around.

Any ideas????

merkinmuffley

Or maybe the other way around.

this is how i'd tackle the problem, BUT it'd only work if every field has a unique name wrt the entire process. this pretty obviously fails if there's a "username" field on 2 different pages.

 
<head> 
<script>
function doc_onload(){ 
<?
while (list($el, $value) = each($_SESSION))
{
    ?>
    if (document.form1.elements['<?=$el?>'] != null)
        document.form1.elements['<?=$el?>'].value = '<?=$value?>';
    <?
}
?>
}
</script> 
</head> 
<body ... onload="doc_onload()"> 
<form name=form1 ...> 
<input name="userName">

rscoville

It never occurred to me that I could put javascript inside a php loop! (thus revealing myself as the rank newbie I truly am!)

I'll try it out. Thanks.