function rollToggle(imageObj){
	var thisSRCArray=imageObj.src.split("/");
	var thisFileName=thisSRCArray[(thisSRCArray.length-1)];
	if(thisFileName.indexOf("roll")>=0){
		//it's rolled
		thisSRCArray[(thisSRCArray.length-1)]="n1.gif";
	}else{
		thisSRCArray[(thisSRCArray.length-1)]="n1roll.gif";
	}
	imageObj.src=thisSRCArray.join("/");
}

function rollOver(imageObj){
	var thisSRCArray=imageObj.src.split("/");
	var thisFileName=thisSRCArray[(thisSRCArray.length-1)];
	var endPoint=thisFileName.indexOf(".");
	thisSRCArray[(thisSRCArray.length-1)]=thisFileName.substring(0,endPoint)+"roll.gif"
	imageObj.src=thisSRCArray.join("/");
}

function rollOut(imageObj){
	var thisSRCArray=imageObj.src.split("/");
	var thisFileName=thisSRCArray[(thisSRCArray.length-1)];
	var endPoint=thisFileName.indexOf("roll.");
	thisSRCArray[(thisSRCArray.length-1)]=thisFileName.substring(0,endPoint)+".gif"
	imageObj.src=thisSRCArray.join("/");
}
		var slideShift=-1;
var leftCounter=0;
var rightCounter=0;
var bigCounter=0;
var alphaArray=new Array("a","b","c","d","e","f","g");

function startShow(){
	//alert("hello world");
	if(slideShift==0){
		//set the left image
		leftCounter++;
		if(leftCounter>2){
			leftCounter=0;
			}
		document.leftImage.src="images/left"+alphaArray[leftCounter]+".jpg";
		}
	if(slideShift==1){
		//set the right image
		rightCounter++;
		if(rightCounter>2){
			rightCounter=0;
			}
		document.rightImage.src="images/right"+alphaArray[rightCounter]+".jpg";
		}
	if(slideShift==2){
		//set the big image
		bigCounter++;
		if(bigCounter>2){
			bigCounter=0;
			}
		document.bigImage.src="images/big"+alphaArray[bigCounter]+".jpg";
		}	
	//set next slideShift
	slideShift++;
	if(slideShift>2){
		slideShift=0;
	}
	setTimeout("startShow()",3000);
}
// -->