var sound = new Array();
sound[0]= "banners/font.swf" 
sound[1]= "banners/font.swf" 
sound[2]= "banners/font.swf"
sound[3]= "banners/font.swf" 
sound[4]= "banners/box.swf"
sound[5]="banners/box.swf" 
sound[6]= "banners/dolchbook.swf" 
sound[7]= "banners/dolchbook.swf" 
sound[8]= "banners/dolchbook.swf" 
sound[9]= "banners/dolchbook.swf" 
sound[10]= "banners/box.swf" 
sound[11]= "banners/dolch.swf" 
sound[12]= "banners/counting.swf"
sound[13]= "banners/math.swf"
sound[14]= "banners/class.swf" 
sound[15]= "banners/mathsheet.swf" 
sound[16]= "banners/class.swf" 
sound[17]= "banners/class.swf" 
sound[18]= "banners/class2.swf" 
sound[19]= "banners/class.swf" 
sound[20]= "banners/teacherstore.swf" 
sound[21]= "banners/box.swf" 
sound[22]= "banners/worksheets.swf" 
sound[23]= "banners/worksheets.swf" 
sound[24]= "banners/teacherstore.swf" 




function loadAdvert()
{
        soundFile = getSoundFile();
        document.getElementById('advert').innerHTML =
                "<center>"
                + "<OBJECT"
                + " classid='clsid:D27CDB6E-AE6D-11cf-96B8-444553540000'"
                + " codebase='http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=5,0,0,0'"
                + " WIDTH='500'"
                + " HEIGHT='90'>"
                + "<PARAM NAME='movie' VALUE='" + soundFile + "'> "
                + "<PARAM NAME='quality' VALUE='high'>"
                + "<PARAM NAME='bgcolor' VALUE=#000000>"
                + "<EMBED src='" + soundFile + "'"
                + "  quality='high' bgcolor='#000000'"
                + " WIDTH='500' HEIGHT='90' TYPE='application/x-shockwave-flash' "
                + " PLUGINSPAGE='http://www.macromedia.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash'>"
                + "</EMBED>"
                + "</OBJECT>"
                + "</center>";
}



function getSoundFile()
{
        var index = Math.floor(Math.random() * sound.length);
        
        return sound[index];
}