闭包

擦，手机发的，代码乱了。。。

代码如下
/*
拖拽函数，限定范围为整个窗口内
*/
function drag(obj,map){
var _this = this;
var zindex = 100;
return function(){
obj.onmousedown = function(e){
var e = e || window.event;
var disX = e.clientX - this.offsetLeft;
var disY = e.clientY - this.offsetTop;
console.log(zindex);
var pos = [];
var collision = false;//是否碰撞到
if(map){
for(var i=0;i<map.length;i++){
pos.push({
'left':map[i].offsetLeft,
'top':map[i].offsetTop
});
}
}
obj.style.zIndex = zindex++;
if(obj.setCapture){
obj.setCapture();
obj.onmousemove = mouseMove
obj.onmouseup = mouseUp;
}else{
document.onmousemove = mouseMove;
document.onmouseup = mouseUp;
}
return false;
function mouseMove(e){
var e = e || window.event;
var l = e.clientX - disX;
var t = e.clientY - disY;
if(obj.setCapture){
obj.setCapture();
}
//console.log(e.clientX);
if(l<=-obj.parentNode.getBoundingClientRect().left){
l = -obj.parentNode.getBoundingClientRect().left;
}else if(l>= viewW()- obj.offsetWidth- obj.parentNode.getBoundingClientRect().left){
l = viewW()- obj.offsetWidth - obj.parentNode.getBoundingClientRect().left;
}
if(t<=-obj.parentNode.getBoundingClientRect().top){
t = -obj.parentNode.getBoundingClientRect().top;
}else if(t>= viewH()- obj.offsetHeight- obj.parentNode.getBoundingClientRect().top){
t = viewH()- obj.offsetHeight - obj.parentNode.getBoundingClientRect().top;
}
obj.style.left = l + 'px';
obj.style.top = t + 'px';
if(map){
for(var i=0;i<map.length;i++){
if(map[i] != obj){
var l = obj.offsetLeft;
var t = obj.offsetTop;
var w = obj.offsetWidth;
var h = obj.offsetHeight;
if(map[i].offsetLeft<l+w &&map[i].offsetLeft>l && map[i].offsetTop>t&&map[i].offsetTop<t+h || map[i].offsetLeft+map[i].offsetWidth>l&&map[i].offsetLeft+map[i].offsetWidth<l+w&&map[i].offsetTop<t+h&&map[i].offsetTop>t || map[i].offsetLeft+map[i].offsetWidth>l&&map[i].offsetLeft+map[i].offsetWidth<l+w&&map[i].offsetTop+map[i].offsetHeight<t+h&&map[i].offsetTop+map[i].offsetHeight>t || map[i].offsetLeft+map[i].offsetWidth>l&&map[i].offsetLeft+map[i].offsetWidth<l+w&&map[i].offsetTop+map[i].offsetHeight>t&&map[i].offsetTop+map[i].offsetHeight<t+h){
collision = true;
//break;
}else{
collision = false;
}
}
}
console.log(collision)
}
}
function mouseUp(){
if(obj.releaseCapture){
obj.releaseCapture();
}
this.onmousemove = null;
this.onmouseup = null;
}
};
}

还是没人吗？