var i=1;
function startSlideShow()	
{
changeImage();
}
function changeImage(){		
		//document.getElementById("mainimage_id").src="defaultstyle/images/k"+i+".gif";
		document.getElementById("mainimage_id").src="defaultstyle/images/tfs8"+i+".png";		
		i++;
		if(i>4)
			i=1;
		setTimeout('changeImage()',5000);		
}