function ppcchange()
{
number = Math.floor(Math.random()*1)
if (number==0)
document.write('<img src="/_gfx/main-image.jpg"  border="0">')
if (number==1)
document.write('<img src="/_gfx/homeMainBg3.jpg"  border="0">')
if (number==2)
document.write('<img src="/_gfx/homeMainBg4.jpg"  border="0">')
}