function LinkGen(bannerImageName)
{
    var linkHtml = '<a href="http://www.petkeycard.com/"; title="Petkey";>'
        + '<img src="http://www.petkeycard.com/Resource/Images/Banner/'+ bannerImageName +'; border="0";></a>';
    
    document.getElementById('ctl00_cphMainContent_LinkToUsHTMLText').value = linkHtml;
    
}