//检测上传文件的格式与大小
function filepdftypeandsize(tbid, fileid, txtid, type) {
    //检测上传文件的类型 
    var imgname = $(fileid).val();
    var ext, idx;
    if (imgname == '') {
        return;
    } else {
        idx = imgname.lastindexof(".");
        if (idx != -1) {
            ext = imgname.substr(idx + 1).touppercase();
            ext = ext.tolowercase();
            if (type == 0) {
                if (ext != 'pdf' && ext != 'doc' && ext != 'docx' && ext != 'xls' && ext != 'ppt' && ext != 'xlsx' && ext != 'pptx') {
                    $(fileid).val("");
                    layer.alert("只能上传pdf文档、doc文档、ppt或excel表格类型的文件!",9);
                    return;
                }
            }

        } else {
            if (type == 0) {
                layer.alert("只能上传pdf文档、doc文档、ppt或excel表格类型的文件!", 9);
            }
            return;
        }
    }

    //检测上传文件的大小        
    var isie = /msie/i.test(navigator.useragent) && !window.opera;
    var filesize = 0;
    if (isie && !$(fileid).files) {
        var filepath = $(fileid).val();
        var filesystem = new activexobject("scripting.filesystemobject");
        var file = filesystem.getfile(filepath);
        filesize = file.size;
    } else {
        filesize = $(fileid).get(0).files[0].size;
    }

    var size = filesize;
    var maxsize = 0;
    if (type == 0) {
        maxsize = 1024 * 1024 * 50;
    } else {
        maxsize = 1024 * 1024 * 50;
    }
    if (size > maxsize) {
        $(fileid).attr("disabled", "");
        if (type == 0) {
            layer.alert("文件大小不能超过50m", 9);
        } else {
            layer.alert("文件大小不能超过50m", 9);
        }

    } else {

        $("#edit").ajaxsubmit({
            beforesubmit: function (formdata, jqform, options) {

            },
            type: "post",
            contenttype: "application/json; charset=utf-8",
            datatype: "json",
            secureuri: false,
            url: "/tools/fileimgup.ashx?filedata=" + txtid,
            data: $("#edit").serialize(),
            success: function (data, textstatus) {
                if (data.msg == 1) {
                    $("[name='" + txtid + "']").next().html(data.msname);
                    $("#" + txtid + "").val(data.msbox);
                } else {
                    layer.alert(data.msbox, 9);
                }
            },
            error: function (data, status, e) {
                layer.alert("上传失败，错误信息:" + e, 9);
            }
        });

    }
}