JS表单验证插件(支持Ajax验证)

自己编写了一个表单验证插件，支持ajax验证，使用起来很简单。

每个需要验证的表单元素下面有一个span标签，这个标签的class有一个valid表示需要验证，如果有nullable则表示可为空；rule表示验证规则，msg表示错误提示信息；to表示要验证的元素的name值，如果元素是单个的，to可以不写。该插件会遍历每个有valid的span标签，找出它前面需要验证的元素，根据rule验证，如果验证不通过，则显示边框为红色，鼠标放在元素上时显示错误信息。

验证时机：1、点击提交按钮时显式调用验证方法；2、当元素触发blur时验证。

插件代码：

CSS：

.failvalid
{
    border: solid 2px red !important;
}

JS：

/**
* suxiang
* 2014年12月22日
* 验证插件
*/

SimpoValidate = {
    //验证规则
    rules: {
        int: /^[1-9]\d*$/,
        number: /^[+-]?\d*\.?\d+$/
    },

    //初始化
    init: function () {
        $(".valid").each(function () { //遍历span
            if ($(this)[0].tagName.toLowerCase() == "span") {
                var validSpan = $(this);
                var to = validSpan.attr("to");
                var target;
                if (to) {
                    target = $("input[name='" + to + "'],select[name='" + to + "'],textarea[name='" + to + "']");
                } else {
                    var target = validSpan.prev();
                }
                if (target) {
                    target.blur(function () {
                        SimpoValidate.validOne(target, validSpan);
                    });
                }
            }
        });
    },

    //验证全部，验证成功返回true
    valid: function () {
        SimpoValidate.ajaxCheckResult = true;
        var bl = true;

        $(".valid").each(function () { //遍历span
            if ($(this)[0].tagName.toLowerCase() == "span") {
                var validSpan = $(this);
                var to = validSpan.attr("to");
                var target;
                if (to) {
                    target = $("input[name='" + to + "'],select[name='" + to + "'],textarea[name='" + to + "']");
                } else {
                    target = validSpan.prev();
                }
                if (target) {
                    if (!SimpoValidate.validOne(target, validSpan)) {
                        bl = false;
                    }
                }
            }
        });

        return bl && SimpoValidate.ajaxCheckResult;
    },

    //单个验证，验证成功返回true
    validOne: function (target, validSpan) {
        SimpoValidate.removehilight(target, msg);

        var rule = SimpoValidate.getRule(validSpan);
        var msg = validSpan.attr("msg");
        var nullable = validSpan.attr("class").indexOf("nullable") == -1 ? false : true; //是否可为空
        var to = validSpan.attr("to");
        var ajaxAction = validSpan.attr("ajaxAction");

        if (target) {
            //checkbox或radio
            if (target[0].tagName.toLowerCase() == "input" && target.attr("type") && (target.attr("type").toLowerCase() == "checkbox" || target.attr("type").toLowerCase() == "radio")) {
                var checkedInput = $("input[name='" + to + "']:checked");
                if (!nullable) {
                    if (checkedInput.length == 0) {
                        SimpoValidate.hilight(target, msg);
                        return false;
                    }
                }
            }

            //input或select
            if (target[0].tagName.toLowerCase() == "input" || target[0].tagName.toLowerCase() == "select") {
                var val = target.val();
                if (!nullable) {
                    if ($.trim(val) == "") {
                        SimpoValidate.hilight(target, msg);
                        return false;
                    }
                }
                else {
                    if ($.trim(val) == "") {
                        SimpoValidate.removehilight(target, msg);
                        return true;
                    }
                }

                if (rule) {
                    var reg = new RegExp(rule);
                    if (!reg.test(val)) {
                        SimpoValidate.hilight(target, msg);
                        return false;
                    }
                }

                if (ajaxAction) {
                    SimpoValidate.ajaxCheck(target, val, ajaxAction);
                }
            }
            else if (target[0].tagName.toLowerCase() == "textarea") {
                var val = target.text();
                if (!nullable) {
                    if ($.trim(val) == "") {
                        SimpoValidate.hilight(target, msg);
                        return false;
                    }
                }
                else {
                    if ($.trim(val) == "") {
                        SimpoValidate.removehilight(target, msg);
                        return true;
                    }
                }

                if (rule) {
                    var reg = new RegExp(rule);
                    if (!reg.test(val)) {
                        SimpoValidate.hilight(target, msg);
                        return false;
                    }
                }

                if (ajaxAction) {
                    SimpoValidate.ajaxCheck(target, val, ajaxAction);
                }
            }
        }

        return true;
    },

    ajaxCheckResult: true,

    ajaxCheck: function (target, value, ajaxAction) {
        var targetName = target.attr("name");
        var data = new Object();
        data[targetName] = value;

        $.ajax({
            url: ajaxAction,
            type: "POST",
            data: data,
            async: false,
            success: function (data) {
                if (data.data == true) {
                    SimpoValidate.removehilight(target);
                }
                else {
                    SimpoValidate.ajaxCheckResult = false;
                    SimpoValidate.hilight(target, data.data);
                }
            }
        });
    },

    //获取验证规则
    getRule: function (validSpan) {
        var rule = validSpan.attr("rule");
        switch ($.trim(rule)) {
            case "int":
                return this.rules.int;
            case "number":
                return this.rules.number;
            default:
                return rule;
                break;
        }
    },

    //红边框及错误提示
    hilight: function (target, msg) {
        target.addClass("failvalid");
        target.bind("mouseover", function (e) {
            SimpoValidate.tips(target, msg, e);
        });
        target.bind("mouseout", function () {
            SimpoValidate.removetips();
        });
    },

    //取消红边框及错误提示
    removehilight: function (target) {
        target.unbind("mouseover");
        target.unbind("mouseout");
        target.removeClass("failvalid");
        SimpoValidate.removetips();
    },

    //显示提示
    tips: function (target, text, e) {
        var divtipsstyle = "position: absolute; z-index:99999; left: 0; top: 0; background-color: #dceaf2; padding: 3px; border: solid 1px #6dbde4; visibility: hidden; line-height:20px; font-size:12px;";
        $("body").append("<div class='div-tips' style='" + divtipsstyle + "'>" + text + "</div>");

        var divtips = $(".div-tips");
        divtips.css("visibility", "visible");

        var top = e.clientY + $(window).scrollTop() - divtips.height() - 18;
        var left = e.clientX;
        divtips.css("top", top);
        divtips.css("left", left);

        $(target).mousemove(function (e) {
            var top = e.clientY + $(window).scrollTop() - divtips.height() - 18;
            var left = e.clientX;
            divtips.css("top", top);
            divtips.css("left", left);
        });
    },

    //移除提示
    removetips: function () {
        $(".div-tips").remove();
    }
};

$(function () {
    SimpoValidate.init();
});

如何使用：

Edit页面：

@using Model.Suya;
@{
    ViewBag.Title = "Add";
    Layout = "~/Views/Shared/_Layout.cshtml";
}
@{
    List<sys_post> postList = (List<sys_post>)ViewData["postList"];
    sys_post post = (sys_post)ViewData["post"];
}
<script type="text/javascript">
    $(function () {
        //部门树
        $('#dept').combotree({
            url: 'GetDeptTree',
            required: false,
            checkbox: true,
            onLoadSuccess: function () {
                $('#dept').combotree('setValue', "@(post.depCode)");
            }
        });

        //操作结果
        $("#ifrm").load(function (data) {
            var data = eval("(" + $("#ifrm").contents().find("body").html() + ")");
            alert(data.msg);
            if (data.ok) back();
        });

        $("select[name='postLevel']").find("option[value='@(post.postLevel)']").attr("selected", "selected");
    });

    //保存
    function save() {
        if (valid()) {
            $("#frm").submit();
        }
    }

    //验证
    function valid() {
        var dept = $("input[name='dept']");
        if (!dept.val()) {
            SimpoValidate.hilight(dept.parent(), "请选择所属部门");
        } else {
            SimpoValidate.removehilight(dept.parent());
        }

        return SimpoValidate.valid();
    }

    //返回
    function back() {
        parent.$('#ttTab').tabs('select', "岗位管理");
        var tab = parent.$('#ttTab').tabs('getSelected');
        tab.find("iframe").contents().find("#btnSearch").click();
        parent.$("#ttTab").tabs('close', '修改岗位信息');
    }
</script>
<div class="tiao">
    <input type="button" class="submit_btn" value="保存" onclick="save()" />
    <input type="button" class="submit_btn" value="返回" onclick="back()" />
</div>
<iframe id="ifrm" name="ifrm" style="display: none;"></iframe>
<form id="frm" method="post" enctype="multipart/form-data" action="/HR/PostManage/SaveEdit?id=@(post.id)"
target="ifrm">
<div class="adminMainContent">
    <div class="box">
        <div class="box-title">
            基础信息
        </div>
        <div class="box-content">
            <table cellpadding="0" cellspacing="0" class="detail" width="100%">
                <tr>
                    <td class="title">
                        <span class="mst">*</span>岗位名称：
                    </td>
                    <td style="width: 35%;">
                        <input type="text" class="xinxi_txt" name="postName" value="@post.postName" />
                        <span class="valid" msg="必填，且长度不能超过50" rule="^(.|\n){0,50}$"></span>
                    </td>
                    <td class="title">
                        <span class="mst">*</span>岗位编号：
                    </td>
                    <td style="width: 35%;">
                        <input type="text" class="xinxi_txt" name="postCode" value="@post.postCode"  />
                        <span class="valid" msg="必填，且长度不能超过20" rule="^(.|\n){0,20}$" ajaxaction="/HR/PostManage/AjaxCheckPostCode?id=@post.id">
                        </span>
                    </td>
                </tr>
                <tr>
                    <td class="title">
                        <span class="mst">*</span> 所属部门：
                    </td>
                    <td style="width: 35%;">
                        <input type="text" name="depCode" id="dept" class="easyui-combotree" style="height: 30px;" />
                    </td>
                    <td class="title">
                        <span class="mst">*</span>汇报对象：
                    </td>
                    <td style="width: 35%;">
                        <select class="xueli" name="reportPostCode" id="agreementType">
                            <option value="" selected="selected">==请选择==</option>
                            @foreach (sys_post item in postList)
                            {
                                if (item.postCode == post.reportPostCode)
                                {
                                <option value="@item.postCode" selected="selected">@item.postName</option>
                                }
                                else
                                {
                                <option value="@item.postCode">@item.postName</option>
                                }
                            }
                        </select>
                        <span class="valid" msg="请选择合同分类">
                    </td>
                </tr>
                <tr>
                    <td class="title">
                        <span class="mst">*</span>岗位级别：
                    </td>
                    <td style="width: 35%;">
                        <select class="xueli" name="postLevel">
                            <option value="" selected="selected">==请选择==</option>
                            <option value="1">1</option>
                            <option value="2">2</option>
                            <option value="3">3</option>
                            <option value="4">4</option>
                            <option value="5">5</option>
                            <option value="6">6</option>
                        </select>
                        <span class="valid" msg="请选择岗位级别">
                    </td>
                    <td class="title">
                    </td>
                    <td style="width: 35%;">
                    </td>
                </tr>
                <tr>
                    <td class="title">
                        <span class="mst">*</span>备注：
                    </td>
                    <td colspan="3" style="width: 35%;">
                        <textarea name="remarks" style="width: 500px;">@post.remarks</textarea>
                        <span class="valid" msg="长度不得超过500" rule="^(.|\n){0,500}$"></span>
                    </td>
                </tr>
            </table>
        </div>
    </div>
</div>
</form>

效果图：