Script 11.9

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<HTML>
<HEAD>
<TITLE>Find the bug</TITLE>
<SCRIPT LANGUAGE=JAVASCRIPT>
	<!-- Hide script from older browsers
	// This script copyright 1997, Tom Negrino and Dori Smith.
	// This script is from "JavaScript for the WWW, Visual QuickStart Guide, 2nd Ed."
	// For more information, see <http://www.chalcedony.com/javascript/>.
	// This script may be used and modified, but the copyright notice must remain intact.

var adImages = new Array("banner1.gif","banner2.gif","banner3.gif")
    var thisAd = 0
    var imgCt = 3
    onError = errWindow
    
    function errWindow(errMsg,location,lineNum) {
    	debugWin = window.open("","debugWin","height=200,width=200,resize=yes")
    	debugWin.document.write("<H1>There was an error at line " + lineNum)
    	debugWin.document.write("<br>The error was: " + errMsg)
    	debugWin.document.close()
    	return true
    }
        
    function rotate() {
        thisAd++
        if (thisAd == imgCt) {
            thisAd = 0
        }
        document.adBanner.src=adImages[thisAd]
        setTimeout("rotat()", 3 * 1000)
    }
	// End hiding script -->
</SCRIPT>
</HEAD>
<BODY BGCOLOR=WHITE onLoad="rotate()">
<CENTER><IMG SRC="images/banner1.gif" WIDTH="400" HEIGHT="75" NAME="adBanner"></CENTER>
</BODY>
</HTML>