发布于 2016-11-17 05:57:56 | 135 次阅读 | 评论: 0 | 来源: 网友投递
这里有新鲜出炉的Javascript教程，程序狗速度看过来！
JavaScript客户端脚本语言
Javascript 是一种由Netscape的LiveScript发展而来的原型化继承的基于对象的动态类型的区分大小写的客户端脚本语言，主要目的是为了解决服务器端语言，比如Perl，遗留的速度问题，为客户提供更流畅的浏览效果。
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>Table</title>
</head>
<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>
<body >
<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 :{}, //所有需要计算重合的元素
overlapList :{}, //已经重合的元素
init : function(elems){
each(elems,function(i,elem,oThis){
elem.setAttribute('overlap',i);
var ret = objPos(elem),l=ret.left,t=ret.top,b=ret.bottom,r=ret.right;
oThis.hostel[i]={elem:elem,leftTopDot:{x:l,y:t},leftBottomDot:{x:l,y:b},rightTopDot:{x:r,y:t},rightBottomDot:{x:r,y:b}};
},this);
},
setElem:function(elem){
if(!elem)return;
var ret = objPos(elem),l=ret.left,t=ret.top,b=ret.bottom,r=ret.right;
this.hostel[elem.getAttribute('overlap')] ={elem:elem,leftTopDot:{x:l,y:t},leftBottomDot:{x:l,y:b},rightTopDot:{x:r,y:t},rightBottomDot:{x:r,y:b}};
},
//判断是否重合
isOverlap : function(my){
var obj= {}, my = this.hostel[my.getAttribute('overlap')];
each(this.hostel,function(key,config,oThis){
// 是元素本身 则返回
if(config.elem === my.elem)return ;
//判断2个div是否重合 如果不重合 则返回
if(my.leftBottomDot.y<=config.leftTopDot.y||my.leftTopDot.y>=config.leftBottomDot.y||my.rightTopDot.x<=config.leftTopDot.x||my.leftTopDot.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<=r&&dot.y>=t&&dot.y<=b)?key:false;
}
};
window.onload = function(){
extend(Drag.options,{callbackmove:move,callbackup:up});
function up(elem){
for(var n in overlap.overlapList)
removeClass(overlap.overlapList[n][0],'focus')
overlap.overlapList = {};
Drag.elem.innerHTML =Drag.elem.id;
};
function move(elem){
overlap.setElem(elem);
//p为判断返回的obj是不是空的
var obj = overlap.isOverlap(elem),name,p = function(o){
for (name in o)
return false;
return true;
}(obj);
//如果是个空对象 则返回 不进行下面的遍历
if(p){
up();
return;
};
var str ='';
overlap.overlapList = obj;
each(overlap.hostel,function(key,config){
if(obj[key]){
addClass(obj[key][0],'focus');
str = str +'与'+obj[key][0].id+'重合的面积为:'+obj[key][1]+'</br>';
}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')]);
};
</script>
</body>
</html>
代码如上，只是感觉效率有点低，小伙伴们有没有什么优化方案呢，还请告之，不胜感激