var whichimage=(Math.round(Math.random()*5))+1;
document.write('<style type="text/css">#masthead { background-image: url(/cla/art/images/backgrounds/materials/top_f'+whichimage+'.jpg); } #left { background-image: url(/cla/art/images/backgrounds/materials/left_f'+whichimage+'.jpg); }</style>');