web前端|js教程
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web前端-js教程
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<!– try{ var winSize = { width:document.documentElement.clientWidth, height:document.documentElement.clientHeight } var MooSky = function(options){ this.options = options; this.stars = new Array(); this.show = function(){ for(var i=0;i<this.options.num;i++){ var newStar = new MooStar({ container : this.options.container }); newStar.fly(); this.stars[i] = newStar; } } } var MooStar = function(options){ this.options = options; if(!!this.options.container){ this.container = document.getElementById(this.options.container); }else{ this.container = document.body; } this.baseSpeed = 10; var o = this; this.speed = Math.round(Math.random()*this.baseSpeed)+1; this.dom = document.createElement(DIV); this.dom.className = star; if(!!this.options.container){ var left = Math.round(Math.random()*this.container.offsetWidth-1); var top = Math.round(Math.random()*this.container.offsetHeight-1); this.dom.style.left = left+px; this.dom.style.top = top+px; this.container.appendChild(this.dom); }else{ this.dom.style.left = Math.random()*winSize.width-1+px; this.dom.style.top = Math.random()*winSize.height-1+px; document.body.appendChild(this.dom); } } MooStar.prototype.fly = function(){ if(this.dom.offsetLeft<0){ if(!!this.options.container){ var left = this.container.offsetWidth-1; var top = Math.round(Math.random()*this.container.offsetHeight)-1; this.dom.style.left = left+px; this.dom.style.top = top+px; }else{ this.dom.style.left = winSize.width-1+px; this.dom.style.top = Math.random()*winSize.height-1+px; } }else{ var left = this.dom.offsetLeft-this.speed; if(left
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