var imgArr = new Array();
imgArr[0]= new Image();
imgArr[0].src='images/home_rightimage1.jpg';
imgArr[1]= new Image();
imgArr[1].src='images/home_rightimage2.jpg';
imgArr[2]= new Image();
imgArr[2].src='images/home_rightimage3.jpg';
imgArr[3]= new Image();
imgArr[3].src='images/home_rightimage4.jpg';
imgArr[4]= new Image();
imgArr[4].src='images/home_rightimage5.jpg';
imgArr[5]= new Image();
imgArr[5].src='images/home_rightimage6.jpg';

var currentimg;
currentimg=0;

function changeimg()
{
    if(currentimg==imgArr.length-1)
        currentimg=0;
    else
        currentimg+=1;
    imgid.src=imgArr[currentimg].src;
setTimeout("changeimg()",4200);
}