images

jQuery.fn.extend({
    uploadPreview: function (opts) {
        var _self = this,
                _this = $(this);
        opts = jQuery.extend({
            preDiv: 'preview',
            Img: "imgPre",
            Width: 80,
            Height: 80,
            ImgType: ["gif", "jpeg", "jpg", "bmp", "png"],
            Callback: function () { }
        }, opts || {});
        _self.getObjectURL = function (file) {
            var url = null;
            if (window.createObjectURL != undefined) {
                url = window.createObjectURL(file)
            } else if (window.URL != undefined) {
                url = window.URL.createObjectURL(file)
            } else if (window.webkitURL != undefined) {
                url = window.webkitURL.createObjectURL(file)
            }
            return url
        };
        _self.show = function () {
            $(".upload_tips").css('color', '#fff');
            $(".change_mask").css('display', 'block');
        }
        _this.change(function () {
            if (this.value) {
                if (!RegExp("\.(" + opts.ImgType.join("|") + ")$", "i").test(this.value.toLowerCase())) {
                    alert("选择文件错误,图片类型必须是" + opts.ImgType.join("，") + "中的一种");
                    this.value = "";
                    return false
                }
                if (/msie/.test(navigator.userAgent.toLowerCase())) {
                    try {
                        //$("#" + opts.Img).attr('src', _self.getObjectURL(this.files[0]))
                        _self.show();
                        $("#" + opts.preDiv).css('backgroundImage', 'url:(' + _self.getObjectURL(this.files[0]) + ')');
                    } catch (e) {
                        var src = "";
                        var obj = $("#" + opts.Img);
                        var div = obj.parent("div")[0];
                        _self.select();
                        if (top != self) {
                            window.parent.document.body.focus()
                        } else {
                            _self.blur();
                        }
                        src = document.selection.createRange().text;
                        document.selection.empty();
                        obj.hide();
                        obj.parent("div").css({
                            'filter': 'progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=scale)',
                            'width': opts.Width + 'px',
                            'height': opts.Height + 'px'
                        });
                        _self.show();
                        div.filters.item("DXImageTransform.Microsoft.AlphaImageLoader").src = src;
                    }
                } else {
                    // _self.show();
                    $("#" + opts.Img).css('display', 'block');
                    $("#" + opts.Img).attr('src', _self.getObjectURL(this.files[0]));
                    //$("#" + opts.preDiv).css('background-image', 'url:('+_self.getObjectURL(this.files[0])+')');
                    //$("#" + opts.preDiv).css('background-image', _self.getObjectURL(this.files[0]));
                }
                opts.Callback();
            }
        })
    }
});