JS简单的轮播的图片滚动实例

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[javascript] 
代码如下:
var forimg = function (foritem, hoverStop, defaultfor) { 
        var _foritem = foritem.constructor == jQuery ? foritem : $(foritem); 
        var imgarr = [ 
            { "z-index": 1, "width": 100, "height": 100, "left": 0, "top": "75px" }, 
            { "z-index": 2, "width": 200, "height": 200, "left": 50, "top": "25px" }, 
            { "z-index": 3, "width": 300, "height": 250, "left": 150, "top": "0" }, 
            { "z-index": 2, "width": 200, "height": 200, "left": 370, "top": "25px" }, 
            { "z-index": 1, "width": 100, "height": 100, "left": 520, "top": "75px" } 
        ]; 
        _foritem.each(function (i) { 
            var _this = $(this); 
            _this.css(imgarr[i] || imgarr[4]); 
            _this.find("img").css(imgarr[i] || imgarr[4]); 
        });   www.gxlcms.com
        var _for = function (_i, data, nulldata, callback) { 
            $(foritem).each(function (i) { 
                var self = $(this); 
                setTimeout(function () { 
                    self.css("z-index", (data[i + _i] || nulldata)["z-index"]) 
                    self.stop().animate(data[i + _i] || nulldata); 
                    self.find("img").stop().animate(data[i + _i] || nulldata, function () { 
                        callback.call(self, i); 
                    }); 
                }); 
            }); 
        }; 
        var that = this; 
        var defaultforfun = function () { 
            if (!defaultfor) { 
                that.leftfor(); 
            } else { 
                that.rightfor(); 
            } 
        } 
        var forimgInterval = setInterval(defaultforfun, 1000); 
        if (hoverStop) { 
            _foritem.hover(function () { 
                clearInterval(forimgInterval); 
            }, function () { 
                forimgInterval = setInterval(defaultforfun, 1000); 
            }); 
        } 
        this.leftfor = function () { 
            var nuldata = { "z-index": -1, "width": 100, "height": 100, "left": 520, "top": "75px" }; 
            imgarr[0]["z-index"] = 1; 
            imgarr[0]["z-index"] = 2 
            imgarr[0]["z-index"] = 3 
            imgarr[0]["z-index"] = 2 
            imgarr[0]["z-index"] = 1 
            _for(-1, imgarr, nuldata, function (i) { 
                if (i == 0) { 
                    this.closest("ul").append(this); 
                } 
            }); 
        }; 
        this.rightfor = function () { 
            var nuldata = { "z-index": -1, "width": 100, "height": 100, "left": 0, "top": "75px" }; 
            imgarr[0]["z-index"] = 1; 
            imgarr[0]["z-index"] = 2 
            imgarr[0]["z-index"] = 4 
            imgarr[0]["z-index"] = 5 
            imgarr[0]["z-index"] = 2 
            _for(1, imgarr, nuldata, function (i) { 
                if (i == _foritem.length - 1) { 
                    this.closest("ul").prepend(this); 
                    this.css("z-index", "1"); 
                } 
            }); 
        }; 
        this.stop = function () { 
            clearInterval(forimgInterval); 
        }; 
        this.next = function () { 
            forimgInterval = setInterval(defaultforfun, 1000); 
        }; 
    }; 

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