function _$(objid) {
		return document.getElementById(objid);
	}
	
	function swap_image(nowid) {
		totalpic = 4;
		maxindex = 100+totalpic
		li_togpic = Array();
		if (!nowid || nowid > totalpic) return false;

		for(i=1;i<=totalpic;i++) {
			li_togpic[i] = _$('li_togpic'+i);
		};
		
		preid = 0;
		tempindex = 0;
		
		for(i=1;i<=totalpic;i++) {
			if(li_togpic[i].style.zIndex == maxindex){
				preid = i;
				break;
			}
		}
		window.nowswapimageid = nowid;
		tempindex = li_togpic[nowid].style.zIndex;
		li_togpic[nowid].style.zIndex = maxindex;
		li_togpic[preid].style.zIndex = tempindex;
		
		for(i=1;i<=totalpic;i++) {
			if(i!=nowid)_$('toggle_link'+i).className="";
		}
		_$('toggle_link'+nowid).className="toglink_hover";
	}
	
	function auto_swap_image() {
		if(window.nowswapimageid>=4)window.nowswapimageid = 0;
		swap_image(window.nowswapimageid+1);
	}
	
	window.onload = function() {
		window.nowswapimageid = 1;
		_$('toggle_link'+window.nowswapimageid).className="toglink_hover";
		
		_$('toggle_link1').onclick = function() {
			swap_image(1);
			clearTimeout(window.swapimgInterval);
			window.swapimgInterval=setInterval("auto_swap_image()",5000);
			return false;
		};
		_$('toggle_link2').onclick = function() {
			swap_image(2);
			clearTimeout(window.swapimgInterval);
			window.swapimgInterval=setInterval("auto_swap_image()",5000);
			return false;
		};
		_$('toggle_link3').onclick = function() {
			swap_image(3);
			clearTimeout(window.swapimgInterval);
			window.swapimgInterval=setInterval("auto_swap_image()",5000);
			return false;
		};_$('toggle_link4').onclick = function() {
			swap_image(4);
			clearTimeout(window.swapimgInterval);
			window.swapimgInterval=setInterval("auto_swap_image()",5000);
			return false;
		};
		
		window.swapimgInterval=setInterval("auto_swap_image()",5000);
	};