为生命保险做准备，拖延不如早做，仅需省略两餐外食的费用

var StickerAnimation = function(){}; StickerAnimation.prototype = { duration : null, obj : null, from : null, to : null, timer : 0, step : 0, start : function(obj, from, to, duration, type){ var self = this; this.obj = obj; this.from = from; this.to = to; this.now = new Date; this.duration = duration || 1000; this._delta = this['_delta' +(type || 'Elastic')]; if(this.timer) this.stop(); this.timer = setInterval(function(){self.run();}, 10); }, run : function() { var time = ((new Date) - this.now) / this.duration; var delta = this._delta(time); var step = Math.pow(2, this.step); var dep_x = (this.to.x - this.from.x) * delta; var dep_y = (this.to.y - this.from.y) * delta; if(time > 1) { this.stop(); this.end(); } else { this.obj.style.marginLeft = this.from.x + dep_x + "px"; this.obj.style.marginTop = this.from.y + dep_y + "px"; } }, end : function() { this.obj.style.marginLeft = (this.to.x) + "px"; this.obj.style.marginTop = (this.to.y) + "px"; }, stop : function() { clearInterval(this.timer); this.timer = 0; }, _deltaBounce : function(pos) { var p = 1 - pos; var value; for (var a = 0, b = 1; 1; a += b, b /= 2) { if (p >= (7 - 4 * a) / 11) { value = - Math.pow((11 - 6 * a - 11 * p) / 4, 2) + b * b; break; } } return 1 - value; }, _deltaExpo : function(pos) { var p = 1 - pos; return 1 - Math.pow(2, 8 * (p - 1)); }, _deltaElastic : function(pos) { var p = 1 - pos; return 1 - Math.pow(2, 10 * --p) * Math.cos(20 * p * Math.PI * 1 / 3); }, _deltaStatic : function(pos) { return 1; } } var StickerManager = { init : false, stickers : [], opts : [], add : function(id, duration, type) { if(!this.init) { var self = this; var init_event = function(){self.oninit();}; var scroll_event = function(){self.onscroll();}; if(window.attachEvent) { window.attachEvent('onload', init_event); window.attachEvent('onscroll', scroll_event); } else { window.addEventListener('load', init_event, false); document.addEventListener('scroll', scroll_event, false); } this.init = true; } this.stickers.push({id:id, duration:duration, type:type}); this.opts.push({id:id, duration:duration, type:type}); } }