var maxLay = 12;			//最大点数
var actT = 50;				//追跡速度（小→速い）

var count = 0;
var my = -100;
var mx = -100;
var lay;
var coln;

if(document.all){
	document.onmousemove = Mmove;
}else if(document.layers){
	window.captureEvents(Event.MOUSEMOVE);
	window.onMouseMove = Mmove;
}else if(document.getElementById){
	document.onmousemove = Mmove;
}

function Mmove(e){
	gct = 1;
	if(document.all){
		mx = event.x+ document.body.scrollLeft+10;
		my = event.y+ document.body.scrollTop+10;
	}else if(document.layers){
		mx = e.pageX+10;
		my = e.pageY+10;
	}else if(document.getElementById){
		mx = e.pageX+10;
		my = e.pageY+10;
	}
}

function Init(){
	for (i = 0; i < (maxLay - 1); i++){
		if(document.all){
			document.all("iL"+i).style.visibility = "visible";
		}else if(document.layers){
			document.layers["iL"+i].visibility = "show";
		}else if(document.getElementById){
			document.getElementById("iL"+i).style.visibility = "visible";
		}
	}
	main();
}

function main(){
	for (i = 0; i < (maxLay - 1); i++){
		if(document.all){
			document.all("iL"+i).style.left = document.all("iL"+(i+1)).style.left;
			document.all("iL"+i).style.top  = document.all("iL"+(i+1)).style.top;
		}else if(document.layers){
			document.layers["iL"+i].left = document.layers["iL"+(i+1)].left;
			document.layers["iL"+i].top  = document.layers["iL"+(i+1)].top;
		}else if(document.getElementById){
			document.getElementById("iL"+i).style.left = document.getElementById("iL"+(i+1)).style.left;
			document.getElementById("iL"+i).style.top  = document.getElementById("iL"+(i+1)).style.top;
		}
	}
	if(document.all){
		document.all("iL"+(maxLay-1)).style.left = mx;
		document.all("iL"+(maxLay-1)).style.top  = my;
	}else if(document.layers){
		document.layers["iL"+(maxLay-1)].left = mx;
		document.layers["iL"+(maxLay-1)].top  = my;
	}else if(document.getElementById){
		document.getElementById("iL"+(maxLay-1)).style.left = mx;
		document.getElementById("iL"+(maxLay-1)).style.top  = my;
	}
	count++;
	setTimeout('main()',actT);
}