滚动鼠标控制图片大小

废话少说   贴码

直接调用mouseOp()方法便可

 function mouseOp(){
        var imgs = document.getElementsByTagName("img"),
            len = imgs.length,
            browserInfo = navigator.userAgent,
            reg = /firefox/i;

        function fun(e) {
            var e = e || event;
            var detail = e.detail || parseInt(-e.wheelDelta / 40);
            this.setAttribute("height", this.offsetHeight + 4 * detail);
        }

        function mouseWheel(ele, fun) {
            reg.test(browserInfo) ? ele.addEventListener("DOMMouseScroll", fun, false) : ele.onmousewheel = fun;　　　　　　　
        }

        for ( i = 0; i < len; i++) {
            mouseWheel(imgs[i], fun)
        }
    }