function change()
{
number = Math.floor(Math.random()*4)
if (number==0)
document.write('<img src="images/header.jpg" width="777" height="165" align="top" border="0" alt="TPSU - A Dept-Free Life Style">')
if (number==1)
document.write('<img src="images/header2.jpg" width="777" height="165" align="top" border="0" alt="TPSU - A Dept-Free Life Style">')
if (number==2)
document.write('<img src="images/header3.jpg" width="777" height="165" align="top" border="0" alt="TPSU - A Dept-Free Life Style">')
if (number==3)
document.write('<img src="images/header4.jpg" width="777" height="165" align="top" border="0" alt="TPSU - A Dept-Free Life Style">')

}