//Rollover Script by James McCann

var lastImgNo = 6;
var noChanges = 0;
var imgUpdate = 5;
var prevImages = new Array(6);
    prevImages[0] = 99;
    prevImages[1] = 99;
    prevImages[2] = 99;
    prevImages[3] = 99;
    prevImages[4] = 99;
    prevImages[5] = 99;

if ((navigator.appName=="Netscape")&&(parseInt(navigator.appVersion)>=3) || (document.images))
{

    topphoto0 = new Image();
    topphoto0.src = "topphoto1.jpg";
    topphoto1 = new Image();
    topphoto1.src = "topphoto2.jpg";
    topphoto2 = new Image();
    topphoto2.src = "topphoto3.jpg";
    topphoto3 = new Image();
    topphoto3.src = "topphoto4.jpg";
    topphoto4 = new Image();
    topphoto4.src = "topphoto5.jpg";
    topphoto5 = new Image();
    topphoto5.src = "topphoto6.jpg";

}

function changeImg(imgName) 
{
    if ((navigator.appName=="Netscape")&&(parseInt(navigator.appVersion)>=3) || (document.images))
    {
	var ranImgNo = Math.floor(Math.random() * lastImgNo);	


	while ((ranImgNo == prevImages[0]) || 
		(ranImgNo == prevImages[1]) || 
		(ranImgNo == prevImages[2]) || 
		(ranImgNo == prevImages[3]) || 
		(ranImgNo == prevImages[4]) || 
		(ranImgNo == prevImages[5]))
	{
	    ranImgNo = Math.floor(Math.random() * lastImgNo);			
	}
	
	document[imgName].src = eval(imgName + ranImgNo + ".src");
	
	prevImages[5] = prevImages[4];
	prevImages[4] = prevImages[3];
	prevImages[3] = prevImages[2];
	prevImages[2] = prevImages[1];
	prevImages[1] = prevImages[0];
	prevImages[0] = ranImgNo;        
    
	//setTimeout("changeImg('topphoto')",imgUpdate);
	noChanges = noChanges + 1;
    }
}