var imagenumber = 5 ; 
var randomnumber = Math.random() ; 
var rand1 = Math.round( (imagenumber-1) * randomnumber) + 1 ; 
images = new Array 
images[1] = "/images/header.jpg"
images[2] = "/images/header2.jpg"
images[3] = "/images/header3.jpg"
images[4] = "/images/header4.jpg"
images[5] = "/images/header5.jpg"
var myimage = images[rand1] 
alt = new Array 
alt[1] = "Office of Arizona State Treasurer" 
alt[2] = "Office of Arizona State Treasurer"
alt[3] = "Office of Arizona State Treasurer"
alt[4] = "Office of Arizona State Treasurer"
alt[5] = "Office of Arizona State Treasurer"
var myalt = alt[rand1]  
document.write('<img src="' + myimage + '" alt="' + myalt + '" border="0">')