Count down with invisible counter

Challenge

You want to use automatically change question, but don't want to show the counter for the respondent. The Next button is often hided when this script is used.

Code

function jumpon()      
{
     document["query"]["dir"].value = "next";
     document["query"].submit();
}

//defines how many milliseconds the question should be visible for the respondent
window.setTimeout("jumpon();", 1500);