//ÏÔʾ²ã
function showlayer(event,imgID) {
	if(!event) {
		event = window.event;
	}
	var layerID = "layer" + imgID;
	var xfix = 0;
	var yfix = 0;
	var yall = 768;
	ml = document.getElementById(layerID);
	if (document.documentElement.scrollTop || document.documentElement.scrollLeft)	{
		xfix = document.documentElement.scrollLeft;
		yfix = document.documentElement.scrollTop;
		yall = document.documentElement.clientHeight;
	}
	else if (document.body.scrollTop || document.body.scrollLeft) {
		xfix = document.body.scrollLeft;
		yfix = document.body.scrollTop;
		yall = document.body.clientHeight;
	}
	if ((yall-event.clientY)<250) {
		ml.style.top = event.clientY + yfix - 45 +'px';
	}
	else {
		ml.style.top = event.clientY + yfix - 45 +'px';
	}
	
	yl = event.clientX + xfix + 45 ;
	if ( (yl + 300) > 1003 ) {
		yl = event.clientX - xfix - 32 - 300 ;
	}
	ml.style.left = yl;
	
	ml.style.visibility = "visible";
}
//È¡Ïû²ã
function cutlayer(imgID) {
	var layerID = "layer" + imgID;
	ml = document.getElementById(layerID);
	ml.style.visibility = "hidden";
	ml.style.left = "0px";
	ml.style.top  = "0px";
}