判断可拖动div是否重合 重合多少

Table

body{margin:0px; padding:0px; font-size:12px}
.div{height:160px;width:160px;position:absolute; text-align:center; }
.demo1{ border:1px solid #96C2F1;background-color:#EFF7FF;left:150px;top:20px}
.demo2{ border:1px solid #9BDF70;background-color:#F0FBEB;left:450px;top:20px}
.demo3{ border:1px solid #BBE1F1;background-color:#EEFAFF;left:750px;top:20px}
.demo4{ border:1px solid #96C2F1;background-color:#EEFAFF;left:150px;top:220px}
.demo5{ border:1px solid #FFCC00;background-color:#FFFFF7;left:450px;top:220px}
.demo6{ border:1px solid #E3E197;background-color:#FFFFDD;left:750px;top:220px}
.demo7{ border:1px solid #ADCD3C;background-color:#F2FDDB;left:150px;top:420px}
.demo8{ border:1px solid #F8B3D0;background-color:#FFF5FA;left:450px;top:420px}
.demo9{ border:1px solid #D3D3D3;background-color:#F7F7F7;left:750px;top:420px}
.focus{background-color: #990000;}

demo1

demo2

demo3

demo4

demo5

demo6

demo7

demo8

demo9

(function(window,undefined){
window.Sys = function (ua){
var b = {
ie: /msie/.test(ua) && !/opera/.test(ua),
opera: /opera/.test(ua),
safari: /webkit/.test(ua) && !/chrome/.test(ua),
firefox: /firefox/.test(ua),
chrome: /chrome/.test(ua)
},vMark = "";
for (var i in b) {
if (b[i]) { vMark = "safari" == i ? "version" : i; break; }
}
b.version = vMark && RegExp("(?:" + vMark + ")[\\/: ]([\\d.]+)").test(ua) ? RegExp.$1 : "0";
b.ie6 = b.ie && parseInt(b.version, 10) == 6;
b.ie7 = b.ie && parseInt(b.version, 10) == 7;
b.ie8 = b.ie && parseInt(b.version, 10) == 8;
return b;
}(window.navigator.userAgent.toLowerCase());

window.Sys.ie6&&document.execCommand("BackgroundImageCache", false, true);

window.$ = function(Id){
return document.getElementById(Id);
};
window.addListener = function(element,e,fn){
!element.events&&(element.events = {});
element.events[e]&&(element.events[e][addListener.guid++]=fn)||(element.events[e] = {'0':fn});
element.addEventListener?element.addEventListener(e,fn,false):element.attachEvent("on" + e,fn);
};
window.addListener.guid = 1;
window.removeListener = function(element,e,fn){
var handlers = element.events[e],type;
if(fn){
for(type in handlers)
if(handlers[type]===fn){
element.removeEventListener?element.removeEventListener(e,fn,false):element.detachEvent("on" + e,fn);
delete handlers[type];
}
}else{
for(type in handlers){
element.removeEventListener?element.removeEventListener(e,handlers[type],false):element.detachEvent("on" + e,handlers[type]);
delete handlers[type];
}
}
};
window.setStyle = function(e,o){
if(typeof o=="string")
e.style.cssText=o;
else
for(var i in o)
e.style[i] = o[i];
};

var slice = Array.prototype.slice;
window.Bind = function(object, fun) {
var args = slice.call(arguments).slice(2);
return function() {
return fun.apply(object, args);
};
};
window.BindAsEventListener = function(object, fun,args) {
var args = slice.call(arguments).slice(2);
return function(event) {
return fun.apply(object, [event || window.event].concat(args));
}
};
//copy from jQ
window.extend = function(){
var target = arguments[0] || {}, i = 1, length = arguments.length, deep = true, options;
if ( typeof target === "boolean" ) {
deep = target;
target = arguments[1] || {};
i = 2;
}
if ( typeof target !== "object" && Object.prototype.toString.call(target)!="[object Function]")
target = {};
for(;i=config.leftBottomDot.y||my.rightTopDot.x=config.rightTopDot.x)
return;
obj[config.elem.getAttribute('overlap')] =[config.elem,oThis.howOverlap(my,config)];
},this);
return obj;
},
//判断重合面积
howOverlap : function(my,other){
var l=other.leftBottomDot.x,r=other.rightTopDot.x,t=other.leftTopDot.y,b=other.leftBottomDot.y,arr=[],
lt = this.include(my.leftTopDot,l,r,t,b,'leftTopDot-rightBottomDot'),
lb = this.include(my.leftBottomDot,l,r,t,b,'leftBottomDot-rightTopDot'),
rt = this.include(my.rightTopDot,l,r,t,b,'rightTopDot-leftBottomDot'),
rb = this.include(my.rightBottomDot,l,r,t,b,'rightBottomDot-leftTopDot');
lt&&arr.push(lt)||lb&&arr.push(lb)||rt&&arr.push(rt)||rb&&arr.push(rb);

if(!arr[0]) return 0;
//一个点 或者是 2个点都在其中 计算方法是一样的
if(arr.length===1||arr.length===2){
var key = arr[0].split('-'),x1=my[key[0]].x,y1=my[key[0]].y,x2=other[key[1]].x,y2=other[key[1]].y;
return Math.abs((x1-x2)*(y1-y2));
};
//完全重合
if(arr.length===4){
return 162*162;
};
},
//看点是不是在另一个div中
include : function(dot,l,r,t,b,key){
return (dot.x>=l&&dot.x=t&&dot.y';
}else{
removeClass(config.elem,'focus');
}
});
Drag.elem.innerHTML = str;
};
Drag.init($('demo1'),$('demo2'),$('demo3'),$('demo4'),$('demo5'),$('demo6'),$('demo7'),$('demo8'),$('demo9'));
overlap.init([$('demo1'),$('demo2'),$('demo3'),$('demo4'),$('demo5'),$('demo6'),$('demo7'),$('demo8'),$('demo9')]);
};

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