Passing JavaScript Variable to PHP Session variable

Question

I am trying to update/create session variable when I change the option thru a drop-down box. TThe value is stored in a javascript function. Can any1 tell me how I can pass this

Answer 1

No ajax? ok,

var img = new Image();
img.src = "script.php?myVal=" + encodeURIComponent(theValueToPass);

The browser will try to load the image by requesting the url. Obviously it will be a fools errand, but your php script will get executed and the value available in php's $_GET['myVal']