MyImages=new Array();

MyImages[0]='img/header/header1.jpg';
MyImages[1]='img/header/header2.jpg';
MyImages[2]='img/header/header3.jpg';
MyImages[3]='img/header/header4.jpg';
MyImages[4]='img/header/header5.jpg';
MyImages[5]='img/header/header6.jpg';

function newImage()
{
	document.getElementById("mainImage").setAttribute("src", MyImages[Math.round(Math.random()*5)])
}