发布于 2017-01-18 21:13:53 | 140 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。

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本篇文章主要介绍了js鼠标滑轮滚动事件绑定的简单实例(兼容主流浏览器)。需要的朋友可以过来参考下，希望对大家有所帮助

/** Event handler for mouse wheel event. 
         *鼠标滚动事件 
         */  
        var wheel = function(event) {  
            var delta = 0;  
            if (!event) /* For IE. */  
                event = window.event;  
            if (event.wheelDelta) { /* IE/Opera. */  
                delta = event.wheelDelta / 120;  
            } else if (event.detail) {  
                /** Mozilla case. */  
                /** In Mozilla, sign of delta is different than in IE. 
                 * Also, delta is multiple of 3. 
                 */  
                delta = -event.detail / 3;  
            }  
            /** If delta is nonzero, handle it. 
             * Basically, delta is now positive if wheel was scrolled up, 
             * and negative, if wheel was scrolled down. 
             */  
            if (delta)  
                handle(delta);  
            /** Prevent default actions caused by mouse wheel. 
             * That might be ugly, but we handle scrolls somehow 
             * anyway, so don't bother here.. 
             */  
            if (event.preventDefault)  
                event.preventDefault();  
            event.returnValue = false;  
        }  

        /** Initialization code.  
         * If you use your own event management code, change it as required. 
         */  
        if (window.addEventListener) {  
            /** DOMMouseScroll is for mozilla. */  
            window.addEventListener('DOMMouseScroll', wheel, false);  
        }  
        /** IE/Opera. */  
        window.onmousewheel = document.onmousewheel = wheel;  

        /** This is high-level function. 
         * It must react to delta being more/less than zero. 
         */  
        var handle = function(delta) {  
            var random_num = Math.floor((Math.random() * 100) + 50);  
            if (delta < 0) {  
                // alert("鼠标滑轮向下滚动：" + delta + "次！"); // 1  
                $("btn_next_pic").onclick(random_num);  
                return;  
            } else {  
                // alert("鼠标滑轮向上滚动：" + delta + "次！"); // -1  
                $("btn_last_pic").onclick(random_num);  
                return;  
            }  
        }