passing value to php by javascript

[shaky]

hi,
I'm using a dropdown box <SELECT><option></SELECT>,and a text box in a form
that stores values in a database.
I want that when i change option value in box,then this value is passed to javascript using onChange
according to that option value i want to fetch data from database and to display this result to text box,so that i can insert these two values(option value and text) in another table.
is it possible ?How can we do this? i don't know how to pass variable to php using javascript.
plz help me.
thanks

[OhLordy]

Javascript is processed clientside and PHP is processed server side. This means that you cannot pass values from javascript to php without reloading the page. You have only two options here really.
a) You can reload the page every time the dropdown box is changed (only really viable if the page is very small)
b)Populate a number of javascript arrays when the page is generated and then grab the data from the arrays when the dropdown box is changed (only really viable if there is a small amount of data to go in the javascript arrays)
Hope this helps
Rob
PS Of course you could split your form up so it's accross a number of pages. They select the contents of the drop down on one page and then go on to the next page to continue.

[leetcrew]

php can read/write java-script generated cookies?