var contents=new Array()
contents[0]='<IMG SRC="hardrock.jpg" WIDTH="150"  HEIGHT="141" BORDER="0" ALT="Hard Rock">'
contents[1]='<IMG SRC="hardrock_1.jpg" WIDTH="150"  HEIGHT="120" BORDER="0" ALT="Hard Rock">'

var the_one
var z=0
the_one=Math.floor(Math.random()*contents.length)
document.write(contents[the_one]);