var ad = []
ad[0]=["http://www.medicast.com", "images/banner/medicast.gif"]
ad[1]=["http://www.emedicalwire.com" , "images/banner/emedicalwire.gif"]
ad[2]=["http://www.expectad.com" , "images/banner/expectad.gif"]
ad[3]=["http://www.ifulfillments.com" , "images/banner/ifulfillments.gif"]
ad[4]=["http://www.expectdirect.net" , "images/banner/expectdirect.gif"]


x = Math.floor(Math.random()*ad.length)

document.write("<center>")
document.write("<a href='" + ad[x][0] + "' target='_blank'>")
document.write("<img src='" + ad[x][1] + "' border=0/>")
document.write("</a>")
document.write("</center>")