var where = 'left';
var widthOffset = 300;
function startscroll(){
	var timeout;
	timeout = setTimeout("myscroll();", 50);
}
function myscroll(){
	var rnddogs = document.getElementById('rnd_dogs');
	if (widthOffset < 300) return;
	if (where == 'left'){
		rnddogs.style.left = (-parseInt(rnddogs.style.zIndex)-1)+'px';
		rnddogs.style.zIndex = parseInt(rnddogs.style.zIndex)+1;
	}
	else {
		rnddogs.style.left = (-parseInt(rnddogs.style.zIndex)+1)+'px';
		rnddogs.style.zIndex = parseInt(rnddogs.style.zIndex)-1;
	}
	//alert(rnddogs.clientWidth)
	if (rnddogs.style.zIndex > widthOffset)
		where = 'right';
	else if (rnddogs.style.zIndex < 12)
		where = 'left';
	timeout = setTimeout("myscroll();", 50);
}