/*New function*/
var m = 0;
var imgArrayIndex = new Array();
function changeImgIndex(){
	/*New array*/
	imgArrayIndex[0] = "images/scroll/001.jpg";
	imgArrayIndex[1] = "images/scroll/002.jpg";
	imgArrayIndex[2] = "images/scroll/003.jpg";
	imgArrayIndex[3] = "images/scroll/004.jpg";
	/*Get main image*/
	document.getElementById('mainImgIndex').src = imgArrayIndex[m];
		/*number plus one*/
		m++;
		/*Checking that the m++ function ends*/
		if (m >= imgArrayIndex.length){
			m=0;
		} 
			/*Setting a timer*/
			setTimeout('changeImgIndex()', 4000);
}