var imagenumber = 2;
var randomnumber = Math.random() ;
var rand1 = Math.round( (imagenumber-1) * randomnumber) + 1 ;
images = new Array;
images[1] = "i/header1.jpg";
images[2] = "i/header2.jpg";
var image = images[rand1];

function whatsnew(id) {
	url="whatsnew.php?id=" + id;
	if (document.all)
        var xMax = screen.width, yMax = screen.height;
    else
        if (document.getElementById)
            var xMax = window.outerWidth, yMax = window.outerHeight;
        else
            var xMax = 640, yMax=480;

    var xOffset = (xMax - 502)/2, yOffset = (yMax - 412)/2;
	var what = window.open(url, '','left=0,top=0,locationbar=0,menubar=0,resizeable=0,width=516,height=412,screenX='+xOffset+',screenY='+yOffset+',top='+yOffset+',left='+xOffset+'');
	what.focus();
}