jQuery 动态云标签插件

                var a = construct();
                var opcy = a.css(‘opacity’);  // 透明度
                var zInx = a.css(‘zIndex’);      // 层数
                var botm = a.css(‘bottom’).replace(‘px’,”); // 初始到底部距离
                var space = T_height – a.height() – a.css(‘bottom’).replace(‘px’,”);  // 要移动的距离
               
                var n = space/3;    // 变换透明度距离
                var step = 1-opcy;    // 要变化透明度值
                var sec = n/opts.move_step*opts.move_speed/1000; // 距离/单步长 * 单步长秒数 = 需要秒数
                var s_opcy = opts.move_speed/1000/sec * step;  // 每次循环需要变换的透明度值
                var speed_ = getRandomNum(new Number(opts.move_speed)-30,new Number(opts.move_speed)+30);
                var currOpcy;    // 记录鼠标移入时透明度
//                console.log(opts.move_speed+’….’+speed_)
                /** 元素移动循环 **/
                var s = setInterval(function(){
                    interVal(a,s_opcy,botm,n,space,s);
                }, speed_)
               
                a.mouseover(function(){    // 鼠标移入
                    currOpcy = a.css(‘opacity’);