var i=0;
var imgArry = new Array();

imgArry[0]='images/weston_hotels.jpg';
imgArry[1]='images/1paise_sms_reliance.jpg';
imgArry[2]='images/nokia_n_series_mobile.jpg';
imgArry[3]='images/canon_camera.jpg';

function show(imgObject)
	{
	if(i>=imgArry.length)
	{
		i=0;
		document.getElementById(imgObject).src = imgArry[i];
		i=i+1;
	}
	else 
	{
		document.getElementById(imgObject).src = imgArry[i];
		i=i+1;
	}
	setTimeout("show('"+imgObject+"')",4500);
}