Javascript Vars to PHP

[Anon]

I am trying to test something out, and pass a javascript variable of screen size to PHP to have PHP determine table widths. (I am bored)

I have the javascript that will detect screen resolution but unfortunately I do not know how to get the results to go into a "hidden" input field to pass to PHP.

Here is the code

<script language="JavaScript">
<!-- This Script was created by Raphael. Visit his Site at: http://www.nr1webresource.com -->
if (screen.width <= 640)
document.write("<CENTER><STRONG> Your current resolution is "+screen.width+""+screen.height+".</STRONG><BR> This Web Site is optimized for a Screen Resolution of 800600 (or better)<BR><STRONG><u>If Possible, please modify</u></STRONG>.</CENTER>")

else {// (screen.width >= 641)
document.write("<CENTER><STRONG> Your current resolution is "+screen.width+"*"+screen.height+".</STRONG><BR> You are using the recommended Screen Resolution for this site!</CENTER>")
}

// -->
</script>

What I want is something like....
<input type="hidden" name="resolution" value="print resolution here">

I dont know much about JavaScript so any help or direction would be greatly appreciated.

Cheers
John

[ethxw]

document.form_name.resolution.value=screen.width

[Anon]

Could you please give me a full example of how I could implement that into a <input> tag?

Do I use the current script with that line or just that line?

Thanks

John

[saltwater]

just put your data in hidden's..
<input type="hidden" name="var_name" value="sometext">
these tags should be in a form you submit, so when you ask for $var_name in the script your form was posted to, in this case it wil contain "sometext", you can alter the value like ethx said with javascript