Hi,

I need to pass a variable value in Javascript back to PHP function as a parameter. Can I do that? Here's a snipet of my code.

<form name="form1">
<?PHP
echo "<script type=\"text/javascript\">";
echo "function go_to()";
echo "{";
echo "var location = document.form1.select1.options[document.form1.select1.selectedIndex].value;";
echo "new_location = " . $_SERVER['PHP_SELF'] . "?" . build_query($_GET, "loc", location)";
echo "alert(new_location);";
echo "}";
echo "</script>";
?>
<select name="select1" onchange="go_to()">
<option value="1" SELECTED>option1</option>
<option value="2">option2</option>
<option value="3">option3</option>
<option value="4">option4</option>
</select>
</form>

My code is not complete, but I hope somebody can understand what I want. The user will select the dropdown called select1, then the value of the selected (1 or 2 or 3 or 4) will be assigned in Javascript to variable location. I need to pass the value of location to the 3rd parameter of the PHP function build_query(). Then print out the new string value in Javascript with alert(). What's the right way to do that?

thanks for any help.