var thisPic = 0;  //the counter for the image array
var lastPic = 7;  //the last cell in our array = (number of pictures - 1)

cnnPix = new Array(lastPic);

cnnPix[0]="/images/company/vcenter1.jpg";
cnnPix[1]="/images/company/vcenter2.jpg";
cnnPix[2]="/images/company/vcenter3.jpg";
cnnPix[3]="/images/company/vcenter4.jpg";
cnnPix[4]="/images/company/vcenter5.jpg";
cnnPix[5]="/images/company/vcenter6.jpg";
cnnPix[6]="/images/company/vcenter7.jpg";
cnnPix[7]="/images/company/vcenter8.jpg";

function processPrevious() {
        if (document.images) {
                if (thisPic==0) //if at the very beginning of array
                {
                    thisPic=lastPic; //goto the last cell in the array
                 }
                 else 
                 {
                    thisPic--; //else simply decrement the counter                    
                 }
                  document.myPicture.src=cnnPix[thisPic];
        }
}

function processNext() {
        if (document.images) {
                if (thisPic==lastPic) //if at the very end of the array
                {
                    thisPic=0; //goto the first cell of the array
                 }
                 else 
                 {
                thisPic++; //else simply increment the counter
                }
                document.myPicture.src=cnnPix[thisPic];
        }
}