////////////最简单的JS显示/隐含移动层函数///////////
var down=false,divleft,divtop,n;

function clase(x){
	document.all['plane'+x].style.display='none'
	}//隐含层

function claseshow(x){
	document.all['plane'+x].style.display='block';
	document.all['plane'+x].style.left=(event.clientX);
	document.all['plane'+x].style.top=(event.clientY+document.body.scrollTop+0);
	}//显示层
function claseshow1(x){
	document.all['plane'+x].style.display='block';
	document.all['plane'+x].style.left=(screen.width/2) - 225;
	document.all['plane'+x].style.top=(screen.height/2) - 50;
	}//显示层
function claseshow2(x){
	document.all['plane'+x].style.display='block';
	document.all['plane'+x].style.left=6;
	document.all['plane'+x].style.top=55;
	}//显示层
function down1(m){
	n=m;
	down=true;
	divleft=event.clientX-parseInt(m.style.left);
	divtop=event.clientY-parseInt(m.style.top);
	}//放下层

function move(){
	if(down){
		n.style.left=event.clientX-divleft;
		n.style.top=event.clientY-divtop;
		}
	}//移动层