表单异步提交数据

<form name="form1">

    <input name="dsfurl" type="hidden" id="dsfurl">
        <table border="0" class="yy">

        <tbody>
            <tr>
                <td align="center"><input name="name" id="name" type="text" class="shur"  value=""  placeholder="请输入您的姓名" ></td>
            </tr>

            <tr>
                <td align="center"><input id="haoma" name="tel" type="text" class="shur" value="" placeholder="请输入联系电话"  ></td>

            </tr>

            <tr>
                <td align="center" class="field1" style="height:30px">
                    <select type="text" name="yy"  id="dateinfo"  class="shur" style=" 280px;background: #fff;">
                        <option value=''>请选择您的预约日期</option>
                        <script language="javascript">
                            //构造当前日期对象
                            var myDate = new Date();
                            //获取年份
                            var year = myDate.getFullYear(); 
                            //获取当前月份
                            var mouth = myDate.getMonth() + 1;
                            //定义当月的天数；
                            var days;
                            //当月份为二月时，根据闰年还是非闰年判断天数
                            if (mouth == 2) {
                               days = year % 4 == 0 ? 29 : 28;
                            }else if (mouth == 1 || mouth == 3 || mouth == 5 || mouth == 7 || mouth == 8 || mouth == 10 ||mouth == 12) {
                            //月份为：1,3,5,7,8,10,12 时，为大月.则天数为31；
                            days = 31;
                            }else {
                            //其他月份，天数为：30.
                            days = 30;
                            }                        
                            var syu=days-myDate.getDate();
                                
                            if(syu < 7){
                            
                                for(var i = 0; i <=7; i++) {
                                    time = (myDate.getMonth() + 1) + "月" + myDate.getDate() + "日";
                                    document.write("<option value='" + time + "'>" + time + "</option>");
                                    myDate.setDate(myDate.getDate() + 1);
                                }
                            
                            }else{
                                for(var i = 0; i <= syu; i++) {
                                    time = (myDate.getMonth() + 1) + "月" + myDate.getDate() + "日";
                                    document.write("<option value='" + time + "'>" + time + "</option>");
                                    myDate.setDate(myDate.getDate() + 1);
                                }
                            }
                                            
                                    
                            </script>
                    </select>
                </td>
            </tr>
            <tr>
                <td align="center"><textarea  name="bq" id="bq" cols="" rows="" class="shur2"  placeholder="请简要描述一下" ></textarea></td>
            </tr>
            <tr>

                <td align="center"  ><input type="button" class="anniu" id="submit" value="点击提交预约信息" onclick="return checkgh(document.form1)";></td>
            </tr> 
            <tr>

                <td align="center"> <p class="g-foot">温馨提示：工作人员将在一个工作日内与您联系！</p></td>

            </tr>

        </tbody>
    </table>
</form>

<script language="javascript">  
document.getElementById('dsfurl').value=document.referrer;     
</script>

js代码：

function checkgh(fm) {
    if (fm.name.value == '') {
        alert('请输入您的名字');
        window.setTimeout(function () {
            fm.name.focus();
        }, 0);
        return false;
    }
    if (fm.tel.value == '') {
        alert('请输入您的联系方式');
        window.setTimeout(function () {
            fm.tel.focus();
        }, 0);
        return false;
    }
    if (!isMobile(fm.tel.value)) {
        alert("请填入正确的联系号码");
        window.setTimeout(function () {
            fm.tel.focus();
        }, 0);
        return false;
    }
    submitForm(fm);
    return true;
}


var trueStr = '您已成功预约！';

var falseStr = "很抱歉，预约失败！";

function submitForm(form) {
    
    if (getCookie("submitcache") != null) {
        if (new Date().getTime() - getCookie("submitcache") < 1000 * 30) {
            alert("30秒内不能重复提交，请稍后再尝试提交！");
            return false;
                        
        }
    }
    var xmlHttp = createXmlHttp();
    if (!xmlHttp) {
        alert(falseStr);
        return 0;
    }
    var url = 'https//www.5z.com/gh22.php';
    var postData = "";
    var subtnchar = form.submit.value;
    for (var i = 0; i < form.length; i++) {
        postData += form.elements[i].name + "=" + form.elements[i].value + "&";
    }
    xmlHttp.open("POST", url, true);
      xmlHttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded;&charset=utf-8");

    xmlHttp.onreadystatechange = function () {
        if (xmlHttp.readyState == 4 && xmlHttp.status == 200) {
            if (xmlHttp.responseText.indexOf("ok") != -1) {
                try {
                    document.cookie = "submitcache=" + new Date().getTime();
                } catch (e) {}
                alert(trueStr);
                form.reset();
            } else if (xmlHttp.responseText.indexOf("err") != -1) {
                alert(falseStr);
                form.reset();
            } else {
                var jsonString = xmlHttp.responseText;
                alert(jsonString.substring(11, jsonString.length - 2));
            }
            form.submit.value = subtnchar;
            form.submit.disabled = false;
        }
    }
    form.submit.value = "数据提交中……";
    form.submit.disabled = true;
    xmlHttp.send(encodeURI(postData));

    return true;
}

function createXmlHttp() {
    var xmlHttp = null;
    try {
        xmlHttp = new XMLHttpRequest();
    } catch (e) {
        try {
            xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
        } catch (e) {
            xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
        }
    }
    return xmlHttp;
}

function isMobile(s) {
    if (!(/^((1[34578]d{9})|(0d{10,11}))$/.test(s))) {
        return false;
    }
    return true;
}

function getCookie(name) {
    var arr, reg = new RegExp("(^| )" + name + "=([^;]*)(;|$)");
    if (arr = document.cookie.match(reg))
        return unescape(arr[2]);
    else
        return null;
}

php文件执行的结果

1，执行成功 返回status：ok；

2，执行不成功，返回status：err；