常用的js表单验证

1.  字符串非空验证    if (!$("#str",parent.document.body).val()) {              return false;    }2.  手机号格式验证    if (!$("#phone",parent.document.body).val().match(/^1[34578]\d{9}$/)) {              return false;    }3.  手机号第二位验证    if (/^(13|15|16|17|18)\d{9}$/.test(telphone)) {        return true;    } else {        return false;    }4.  验证字符内是否有html标签    'content' : $(this).prev(".replay_area").val().replace(/[^\a-\z\A-\Z0-9\u4E00-\u9FA5\@\.]/g,''),    5.  检验邮箱格式    var myreg = /^([a-zA-Z0-9]+[_|\_|\.]?)*[a-zA-Z0-9]+@([a-zA-Z0-9]+[_|\_|\.]?)*[a-zA-Z0-9]+\.[a-zA-Z]{2,3}$/;        if ($("#email").val() != "" && $("#email").val() != null) {            if (!myreg.test($("#email").val())) {                $("#email").focus();                                return false;            }    }6. 长度限制 <input name="Submit" maxlength()="10">7.只能是汉字    <input type="text" onblur="isChinese(this.value)" placeholder="请输入中文！" /><script language="javascript">function isChinese(obj){var reg=/^[\u0391-\uFFE5]+$/;if(obj!=""&&!reg.test(obj)){alert('必须输入中文！');return false;}}</script>8.只能是英文字母的正则表达式function checkZm(zm){var zmReg=/^[a-zA-Z]*$/;if(zm!=""&&!zmReg.test(zm)){alert("只能是英文字母！");return false;}}9.验证只能为数字function checkNumber(obj){var reg = /^[0-9]+$/;if(obj!=""&&!reg.test(obj)){alert('只能输入数字！');return false;}}10.验证只能是字母和数字function checkZmOrNum(zmnum){var zmnumReg=/^[0-9a-zA-Z]*$/;if(zmnum!=""&&!zmnumReg.test(zmnum)){alert("只能输入是字母或者数字,请重新输入");return false;}} 11.检验时间大小(与当前时间比较) function checkDate(obj){var obj_value=obj.replace(/-/g,"/");//替换字符，变成标准格式(检验格式为：'2009-12-10')// var obj_value=obj.replace("-","/");//替换字符，变成标准格式(检验格式为：'2010-12-10 11:12')var date1=new Date(Date.parse(obj_value));var date2=new Date();//取今天的日期if(date1>date2){alert("不能大于当前时间！");return false;}} 12.屏蔽关键字(这里屏蔽***和****) function test(obj) {if((obj.indexOf ("***") == 0)||(obj.indexOf ("****") == 0)){alert("屏蔽关键字(这里屏蔽***和****)！");return false;}}13.两次输入密码不相同function check(){with(document.all){if(input1.value!=input2.value){alert("密码不一致")input1.value = "";input2.value = "";}else {alert("密码一致");document.forms[0].submit();}}} 14.正则表达式验证身份证号是否正确方法一：此方法只验证身份证号格式：isIDCard1=/^[1-9]\d{7}((0\d)|(1[0-2]))(([0|1|2]\d)|3[0-1])\d{3}$|^[1-9]\d{5}[1-9]\d{3}((0\d)|(1[0-2]))(([0|1|2]\d)|3[0-1])\d{3}([0-9]|X)$/;方法二：（1）、定义一个全国地区的对象var aCity={11:"北京",12:"天津",13:"河北",14:"山西",15:"内蒙古",21:"辽宁",22:"吉林",23:"黑龙江",31:"上海",32:"江苏",33:"浙江",34:"安徽",35:"福建",36:"江西",37:"山东",41:"河南",42:"湖北",43:"湖南",44:"广东",45:"广西",46:"海南",50:"重庆",51:"四川",52:"贵州",53:"云南",54:"西藏",61:"陕西",62:"甘肃",63:"青海",64:"宁夏",65:"新疆",71:"台湾",81:"香港",82:"澳门",91:"国外"}（2）、function isCardID(sId){ var iSum=0 ; var info="" ; if(!/^\d{17}(\d|x)$/i.test(sId)) return "你输入的身份证长度或格式错误"; sId=sId.replace(/x$/i,"a"); if(aCity[parseInt(sId.substr(0,2))]==null) return "你的身份证地区非法"; sBirthday=sId.substr(6,4)+"-"+Number(sId.substr(10,2))+"-"+Number(sId.substr(12,2)); var d=new Date(sBirthday.replace(/-/g,"/")) ; if(sBirthday!=(d.getFullYear()+"-"+ (d.getMonth()+1) + "-" + d.getDate()))return "身份证上的出生日期非法"; for(var i = 17;i>=0;i --) iSum += (Math.pow(2,i) % 11) * parseInt(sId.charAt(17 - i),11) ; if(iSum%11!=1) return "你输入的身份证号非法"; //aCity[parseInt(sId.substr(0,2))]+","+sBirthday+","+(sId.substr(16,1)%2?"男":"女");//此次还可以判断出输入的身份证号的人性别 return true;} 方法三：function scCard(){  var scType=document.getElementById("sc_card_type").value;  if(scType=="1"){   var scCard=document.getElementById("sc_card_num").value;       if(scCard.length!=0){       if(!checkCard(scCard)){       $("#errorTips").html("身份证号码格式错误");       }else{       $("#errorTips").html("");       }       }  }  return false;  }  //function checkidno(obj) {   var vcity={ 11:"北京",12:"天津",13:"河北",14:"山西",15:"内蒙古",     21:"辽宁",22:"吉林",23:"黑龙江",31:"上海",32:"江苏",     33:"浙江",34:"安徽",35:"福建",36:"江西",37:"山东",41:"河南",     42:"湖北",43:"湖南",44:"广东",45:"广西",46:"海南",50:"重庆",     51:"四川",52:"贵州",53:"云南",54:"西藏",61:"陕西",62:"甘肃",     63:"青海",64:"宁夏",65:"新疆",71:"台湾",81:"香港",82:"澳门",91:"国外"   };  checkCard = function(obj)  {   //var card = document.getElementById('card_no').value;   //是否为空   // if(card === '')   // {   //  return false;   //}   //校验长度，类型   if(isCardNo(obj) === false)   {    return false;   }   //检查省份   if(checkProvince(obj) === false)   {    return false;   }   //校验生日   if(checkBirthday(obj) === false)   {    return false;   }   //检验位的检测   if(checkParity(obj) === false)   {    return false;   }   return true;  };  //检查号码是否符合规范，包括长度，类型  isCardNo = function(obj)  {   //身份证号码为15位或者18位，15位时全为数字，18位前17位为数字，最后一位是校验位，可能为数字或字符X   var reg = /(^\d{15}$)|(^\d{17}(\d|X)$)/;   if(reg.test(obj) === false)   {    return false;   }   return true;  };  //取身份证前两位,校验省份  checkProvince = function(obj)  {   var province = obj.substr(0,2);   if(vcity[province] == undefined)   {    return false;   }   return true;  };  //检查生日是否正确  checkBirthday = function(obj)  {   var len = obj.length;   //身份证15位时，次序为省（3位）市（3位）年（2位）月（2位）日（2位）校验位（3位），皆为数字   if(len == '15')   {    var re_fifteen = /^(\d{6})(\d{2})(\d{2})(\d{2})(\d{3})$/;    var arr_data = obj.match(re_fifteen);    var year = arr_data[2];    var month = arr_data[3];    var day = arr_data[4];    var birthday = new Date('19'+year+'/'+month+'/'+day);    return verifyBirthday('19'+year,month,day,birthday);   }   //身份证18位时，次序为省（3位）市（3位）年（4位）月（2位）日（2位）校验位（4位），校验位末尾可能为X   if(len == '18')   {    var re_eighteen = /^(\d{6})(\d{4})(\d{2})(\d{2})(\d{3})([0-9]|X)$/;    var arr_data = obj.match(re_eighteen);    var year = arr_data[2];    var month = arr_data[3];    var day = arr_data[4];    var birthday = new Date(year+'/'+month+'/'+day);    return verifyBirthday(year,month,day,birthday);   }   return false;  };  //校验日期  verifyBirthday = function(year,month,day,birthday)  {   var now = new Date();   var now_year = now.getFullYear();   //年月日是否合理   if(birthday.getFullYear() == year && (birthday.getMonth() + 1) == month && birthday.getDate() == day)   {    //判断年份的范围（3岁到100岁之间)    var time = now_year - year;    if(time >= 0 && time <= 130)    {     return true;    }    return false;   }   return false;  };  //校验位的检测  checkParity = function(obj)  {   //15位转18位   obj = changeFivteenToEighteen(obj);   var len = obj.length;   if(len == '18')   {    var arrInt = new Array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2);    var arrCh = new Array('1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2');    var cardTemp = 0, i, valnum;    for(i = 0; i < 17; i ++)    {     cardTemp += obj.substr(i, 1) * arrInt[i];    }    valnum = arrCh[cardTemp % 11];    if (valnum == obj.substr(17, 1))    {     return true;    }    return false;   }   return false;  };  //15位转18位身份证号  changeFivteenToEighteen = function(obj)  {   if(obj.length == '15')   {    var arrInt = new Array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2);    var arrCh = new Array('1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2');    var cardTemp = 0, i;     obj = obj.substr(0, 6) + '19' + obj.substr(6, obj.length - 6);    for(i = 0; i < 17; i ++)    {     cardTemp += obj.substr(i, 1) * arrInt[i];    }    obj += arrCh[cardTemp % 11];    return obj;   }   return obj;  };