function randomImage(lang){
    var numberOfImages = 4;
    var j = numberOfImages;
    
    if(j != 0){
        var imgIndex = Math.round(Math.random()*(j-1));
        var rndImg = imgIndex + 1;
        if (lang == "FRC") {
            document.writeln('<img alt="Ouvrir la voie &agrave; une nouvelle &egrave;re dans la sant&eacute; du coeur" width="435" height="64" border="0" src="/images/tagline' + rndImg + '_fr.gif" />');
        } else {
            document.writeln('<img alt="Pioneering a new era in heart health" width="435" height="64" border="0" src="/images/tagline' + rndImg + '.gif" />');
        }
    }
}