text: /**
  	http://www.oleou.com/a/jishu/2014/0613/290.html
  	**/
  	export default function TagCould(container,options){
  		this.radius = 150;
  		this.dtr = Math.PI/180;
  		this.d = 500;
  		this.mcList = [];
  		this.active = false;
  		this.lasta = 1;
  		this.lastb = 1;
  		this.distr = true;
  		this.tspeed = 5;
  		this.size = 250;
  		this.mouseX = 0;
  		this.mouseY = 0;
  		this.howElliptical = 1;
  		this.aA = null;
  		this.oDiv = null;
  		
  		this.container = container;
  		
  		options = options || {};
  		for(var p in options){
  			this[p] = options[p];
  		}
  	}
  	
  	TagCould.prototype.start = function(){
  		var i = 0, oTag = null, self = this;
  	
  		this.oDiv = typeof this.container == "string" ? document.getElementById(this.container) : this.container;
  		
  		this.aA = this.oDiv.getElementsByTagName('a');
  		
  		for(i = 0; i < this.aA.length; i++){
  			oTag={};
  			
  			oTag.offsetWidth = this.aA[i].offsetWidth;
  			oTag.offsetHeight = this.aA[i].offsetHeight;
  			
  			this.mcList.push(oTag);
  		}
  		
  		this.sineCosine( 0,0,0 );
  		
  		this.positionAll();
  		
  		document.addEventListener('mouseover',function(){
  			self.active = true;
  		}, false);
  		
  		document.addEventListener('mouseout',function(){
  			self.active = false;
  		}, false);
  		
  		document.addEventListener('mousemove',function(evt){
  			//var oEvent=window.event || evt;
  			self.onmove(window.event || evt);
  		}, false);
  		
  		document.addEventListener('touchstart',function(){
  			self.active = true;
  		}, false);
  		document.addEventListener('touchmove',function(evt){
  			self.onmove(window.event || evt);
  		}, false);
  		document.addEventListener('touchend',function(){
  			self.active = false;
  		}, false);
  		
  		setInterval(function(){
  			self.update();
  		}, 30);
  	}
  	
  	TagCould.prototype.onmove = function(oEvent){
  		//var oEvent=window.event || evt;
  		oEvent.preventDefault();  
  		
  		if(oEvent.touches && oEvent.touches.length > 0){
  			oEvent.clientX = oEvent.touches[0].clientX;
  			oEvent.clientY = oEvent.touches[0].clientY;
  		}
  		this.mouseX = oEvent.clientX - (this.oDiv.offsetLeft + this.oDiv.offsetWidth / 2);
  		this.mouseY = oEvent.clientY - (this.oDiv.offsetTop + this.oDiv.offsetHeight / 2);
  		
  		this.mouseX /= 5;
  		this.mouseY /= 5;
  	}
  	
  	TagCould.prototype.update = function(){
  		var a,b;
  		
  		if(this.active){
  			a = (-Math.min( Math.max( -this.mouseY, -this.size ), this.size ) / this.radius ) * this.tspeed;
  			b = (Math.min( Math.max( -this.mouseX, -this.size ), this.size ) / this.radius ) * this.tspeed;
  		}
  		else{
  			a = this.lasta * 0.98;
  			b = this.lastb * 0.98;
  		}
  		
  		this.lasta = a;
  		this.lastb = b;
  		
  		if(Math.abs(a)<=0.01 && Math.abs(b)<=0.01){
  			return;
  		}
  		
  		var c=0;
  		this.sineCosine(a,b,c);
  		for(var j = 0; j < this.mcList.length; j++){
  			var rx1 = this.mcList[j].cx,
  				ry1 = this.mcList[j].cy * this.ca + this.mcList[j].cz * (-this.sa),
  				rz1 = this.mcList[j].cy * this.sa + this.mcList[j].cz * this.ca,
  				rx2 = rx1 * this.cb + rz1 * this.sb,
  				ry2 = ry1,
  				rz2 = rx1 * (-this.sb) + rz1 * this.cb,
  				rx3 = rx2 * this.cc + ry2 * (-this.sc),
  				ry3 = rx2 * this.sc + ry2 * this.cc,
  				rz3 = rz2;
  			
  			this.mcList[j].cx = rx3;
  			this.mcList[j].cy = ry3;
  			this.mcList[j].cz = rz3;
  			
  			var per = this.d / (this.d + rz3);
  			
  			this.mcList[j].x = ( this.howElliptical * rx3 * per ) - ( this.howElliptical * 2 );
  			this.mcList[j].y = ry3 * per;
  			this.mcList[j].scale = per;
  			this.mcList[j].alpha = per;
  			
  			this.mcList[j].alpha = (this.mcList[j].alpha - 0.6) * ( 10 / 6 );
  		}
  		
  		this.doPosition();
  		this.depthSort();
  	}
  	TagCould.prototype.depthSort = function(){
  		var i=0,aTmp=[];
  		
  		for(i=0;i<this.aA.length;i++){
  			aTmp.push(this.aA[i]);
  		}
  		
  		aTmp.sort(
  			function (vItem1, vItem2){
  				if(vItem1.cz > vItem2.cz){
  					return -1;
  				}
  				else if(vItem1.cz < vItem2.cz){
  					return 1;
  				}
  				else{
  					return 0;
  				}
  			}
  		);
  		
  		for(i=0;i<aTmp.length;i++){
  			aTmp[i].style.zIndex=i;
  		}
  	}
  	TagCould.prototype.positionAll = function (){
  		var phi = 0,theta = 0,max = this.mcList.length,i = 0,aTmp = [],
  			oFragment = document.createDocumentFragment();
  		
  		//随机排序
  		for(i=0;i<this.aA.length;i++){
  			aTmp.push(this.aA[i]);
  		}
  		
  		aTmp.sort(
  			function (){
  				return Math.random()<0.5?1:-1;
  			}
  		);
  		
  		for(i=0;i<aTmp.length;i++){
  			oFragment.appendChild(aTmp[i]);
  		}
  		
  		this.oDiv.appendChild(oFragment);
  		
  		for( var i=1; i< max+1; i++){
  			if( this.distr ){
  				phi = Math.acos(-1+(2*i-1)/max);
  				theta = Math.sqrt(max*Math.PI)*phi;
  			}
  			else{
  				phi = Math.random() * (Math.PI);
  				theta = Math.random() * (2*Math.PI);
  			}
  			//坐标变换
  			this.mcList[i-1].cx = this.radius * Math.cos(theta) * Math.sin(phi);
  			this.mcList[i-1].cy = this.radius * Math.sin(theta) * Math.sin(phi);
  			this.mcList[i-1].cz = this.radius * Math.cos(phi);
  			
  			this.aA[i-1].style.left = this.mcList[i-1].cx + this.oDiv.offsetWidth/2 - this.mcList[i-1].offsetWidth/2+'px';
  			this.aA[i-1].style.top = this.mcList[i-1].cy + this.oDiv.offsetHeight/2 - this.mcList[i-1].offsetHeight/2+'px';
  		}
  	}
  	TagCould.prototype.doPosition = function(){
  		var l = this.oDiv.offsetWidth / 2,t = this.oDiv.offsetHeight / 2;
  		for(var i=0; i < this.mcList.length; i++){
  			this.aA[i].style.left = this.mcList[i].cx + l - this.mcList[i].offsetWidth / 2+'px';
  			this.aA[i].style.top = this.mcList[i].cy + t - this.mcList[i].offsetHeight / 2+'px';
  			
  			this.aA[i].style.fontSize = Math.ceil(12 * this.mcList[i].scale / 2) + 8 + 'px';
  			
  			this.aA[i].style.filter = "alpha(opacity=" + 100 * this.mcList[i].alpha + ")";
  			this.aA[i].style.opacity = this.mcList[i].alpha;
  		}
  	}
  	TagCould.prototype.sineCosine = function( a, b, c){
  		this.sa = Math.sin(a * this.dtr);
  		this.ca = Math.cos(a * this.dtr);
  		this.sb = Math.sin(b * this.dtr);
  		this.cb = Math.cos(b * this.dtr);
  		this.sc = Math.sin(c * this.dtr);
  		this.cc = Math.cos(c * this.dtr);
  	}
  	