hey im looking for a javascript ...
wut i need is this (bear with me its hard to explain)

when you click on a state it will popup a window ...
the window will ask u to select a city..
lets say u selected "Chicago"
Then the original page will have "Chicago" as the city...
then u finish complteting the corm and submit it...
Thanks,

http://javascriptsearch.com/scripts/Forms/country_chooser.html

Try this
HTML

<select name="city" onChange="popCity(this.value);">
<option value="chicago">Chicago</option>
<option value="chicago">Texas</option>
</select>

JavaScript

<script language="JavaScript">
function popCity(city) {
window.open("http://www.website.com/page.php?city=" + city,"_blank");
}
</script>

Say if you had http://www.website.com/chicago
You'd use "http://www.website.com/" + city

Or if you had http://www.website.com/cities/chicago.html
You'd use "http://www.website.com/cities/" + city + ".html"

Hope it helps.

the thing is i dont want to load like 50000 cities at once bcz it will take really long..
i need when u click on the state it will take u to a file using the state as an argument and then it will show just those cities....
i can do that myself ...
but i have to know how to make it when u press submit it will go back into the box on the original site...

From your popup window, you can use Window.opener to refer to the original window. So in your popup you will want an event handler for when a city is chosen, then you should be able to have Javascript code such as:

window.opener.document.forms[0].city.value = popup.document.forms[0].city.value;

popup in the object reference on the right is not strictly necessary by any means, but I've included it for illustrative purposes.

HTH