var new_window;
function gen_popup(win_width,win_height)
{
var tgt_url = "../PHP_folder/c_reg_now.php" ;
var win_params_txt = "width=" + win_width + ", " + "height=" + win_height + ",scrollbars=yes" ;
var new_window = window.open(tgt_url,"CustReg",win_params_txt);
new_window.focus();
}