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Determine whether draggable divs overlap and how much they overlap_javascript skills

WBOYOriginal: 2016-05-16 18:21:241278browse

<meta http-equiv="Content-Type" content="text/html; charset=gb2312"> 
<title>Table</title> 
 
<style type="text/css"> 
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;} 
</style> 
 
<div id="demo1" class="div demo1">demo1</div> 
<div id="demo2" class="div demo2">demo2</div> 
<div id="demo3" class="div demo3">demo3</div> 
<div id="demo4" class="div demo4">demo4</div> 
<div id="demo5" class="div demo5">demo5</div> 
<div id="demo6" class="div demo6">demo6</div> 
<div id="demo7" class="div demo7">demo7</div> 
<div id="demo8" class="div demo8">demo8</div> 
<div id="demo9" class="div demo9">demo9</div> 
<script language="javascript"> 
(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<length;i++){ 
if ( (options = arguments[ i ]) != null ) 
for(var name in options){ 
var src = target[ name ], copy = options[ name ]; 
if ( target === copy ) 
continue; 
if ( deep && copy && typeof copy === "object" && !copy.nodeType ){ 
target[ name ] = arguments.callee( deep, src || ( copy.length != null ? [ ] : { } ), copy ); 
} 
else if(copy !== undefined) 
target[ name ] = copy; 
} 
} 
return target; 
}; 
//copy from jQ 
window.each = function ( object, callback, args ) { 
var name, i = 0, length = object.length; 
if ( args ) { 
args = Array.prototype.slice.call(arguments).slice(2); 
if ( length === undefined ) { 
for ( name in object ) 
if ( callback.apply( object[ name ],[name,object[ name ]].concat(args) ) === false ) 
break; 
} else 
for ( ; i < length; i++) 
if ( callback.apply( object[ i ],[i,object[ i ]].concat(args)) === false ) // 
break; 
} else { 
if ( length === undefined ) { 
for ( name in object ) 
if ( callback.call( object[ name ], name, object[ name ] ) === false ) 
break; 
} else 
for ( var value = object[0]; 
i < length && callback.call( value, i, value ) !== false; value = object[++i] ){} 
} 
return object; 
}; 
window.currentStyle = function(element){ 
return element.currentStyle || document.defaultView.getComputedStyle(element, null); 
}; 
window.objPos = function(elem){ 
var left = 0, top = 0, right = 0, bottom = 0,doc = elem ? elem.ownerDocument : document; 
if ( !elem.getBoundingClientRect || window.Sys.ie8 ) { 
var n = elem; 
while (n) { left += n.offsetLeft, top += n.offsetTop; n = n.offsetParent; }; 
right = left + elem.offsetWidth; bottom = top + elem.offsetHeight; 
} else { 
var rect = elem.getBoundingClientRect(); 
left = right = doc.documentElement.scrollLeft || doc.body.scrollLeft; 
top = bottom = doc.documentElement.scrollLeft || doc.body.scrollLeft; 
left += rect.left; right += rect.right; 
top += rect.top; bottom += rect.bottom; 
} 
return { "left": left, "top": top, "right": right, "bottom": bottom }; 
}; 
window.hasClass = function(element, className){ 
return element.className.match(new RegExp('(\\s|^)'+className+'(\\s|$)')); 
}; 
window.addClass = function(element, className){ 
!window.hasClass(element, className)&&(element.className += " "+className); 
}; 
window.removeClass = function(element, className){ 
window.hasClass(element, className)&&(element.className = element.className.replace(new RegExp('(\\s|^)'+className+'(\\s|$)'),' ')); 
} 
})(window);

var Drag = { 
elem : null, 
zindex : 0, 
options : {}, 
init : function(){ 
each(arguments,function(i,elem,oThis){ 
addListener(elem,'mousedown',BindAsEventListener(oThis,oThis.start,elem)); 
},this); 
}, 
start : function(e,elem){ 
var elem=this.elem = elem; 
elem.style.zIndex=++this.zindex; 
this.x = e.clientX - elem.offsetLeft ; 
this.y = e.clientY - elem.offsetTop; 
this.marginLeft = parseInt(currentStyle(elem).marginLeft)||0; 
this.marginTop = parseInt(currentStyle(elem).marginTop)||0; 
Sys.ie?elem.setCapture():e.preventDefault(); 
addListener(document,"mousemove",BindAsEventListener(this,this.move)); 
addListener(document,"mouseup",Bind(this,this.up)); 
this.options.callbackmove&&this.options.callbackmove(this.elem); 
}, 
move : function(e){ 
window.getSelection ? window.getSelection().removeAllRanges() : document.selection.empty(); 
var iLeft = e.clientX - this.x,iTop = e.clientY - this.y;obj = this.elem; 
obj.style.left = iLeft - this.marginLeft + "px"; 
obj.style.top = iTop - this.marginTop + "px"; 
this.options.callbackmove&&this.options.callbackmove(this.elem); 
}, 
up : function(){ 
removeListener(document,'mousemove'); 
removeListener(document,'mouseup'); 
Sys.ie&&this.elem.releaseCapture(); 
this.options.callbackup&&this.options.callbackup(this.elem); 
} 
};

var overlap = { 
hostel :{}, //</script>

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