var slide_num=1;
slide_ph=new Array();

for(i=1;i<6;i++){
	slide_ph[i]=new Image();
	slide_ph[i].src="img/top_ph"+i+".jpg";
}

function top_slide() {
	document.top_img.src=slide_ph[slide_num].src;
	slide_num++;
	if(slide_num>5){
		 slide_num=1;
	}
	setTimeout("top_slide()",5000)
}