photoHeaders = new 
Array("http://www.nyu.edu/financial.aid/image/ofahead2.gif","http://www.nyu.edu/financial.aid/image/ofahead3.gif","http://www.nyu.edu/financial.aid/image/ofahead4.gif","http://www.nyu.edu/financial.aid/image/ofahead5.gif","http://www.nyu.edu/financial.aid/image/ofahead6.gif")
imgCt = photoHeaders.length

function selectHeader(){
if (document.images){
randomNum = Math.floor((Math.random() * imgCt))
document.ofaheader.src = photoHeaders[randomNum]
}
}