function PrintDiv() 
{
    document.write( '<div id=content_bg style=\'position:relative; top:0px; left:0px; width:1027px; height:750px; z-index:2; padding:0px;text-\
align: center; background-image:url(training'+ (Math.ceil(Math.random() * 12 )) + '.jpg);\'>\n ');

}