Getting Variable From Remote Javascript Src File

Oct 9, 2007

I'm trying to use a remote file for the purpose of setting the value of a single variable. It contains a single line of code:
var rev_date = "R10-03-07";

In the HTML, it is called like this:
<script language="javascript" src="http://some.domain.com/revdate.js"></script>

There is a function in the head:
function setRevdate() {
document.getElementById("revdate").innerHTML = rev_date;
}

In the Body:
<body onload="setRevdate();">

Then where I want to place the text:
<span id="revdate">--</span>

The problem is that the page loads and the onload event seems to happen before the rev_date string object is created and produces a "rev_date not defined" error. If I hit the browser refresh, however, everything works fine and the text is displayed between the span tags. It continues to work thereafter as long as the browser session is not destroyed.

How can I program this to force the browser to wait for the script to be read in and the variable initiated before calling the function?

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