JS表单数据验证的正则表达式(常用)

常用的验证方法：

checkusernameflag=false; 
 checkpasswordflag=false; 
 checkpasswordagianflag=false; 
 checkemailflag=false; 
// 用户名校验 
function checkusername() { 
 var username = $("userneme").value; 
 var zz = /^[a-za-z0-9]{6,}$/; 
 if (!zz.test(username)) { 
  $("username_warn").innerhtml = " × 用户名不符合规范"; 
  checkusernameflag=false; 
 } else { 
  /*$("username_warn").style.color='blue'; 
  $("username_warn").innerhtml = "√ 用户名可用";*/ 
  showuserexist(username); 
  checkusernameflag=true; 
 } 
} 
//重置提示 
function resetwarn(){ 
 $("username_warn").innerhtml=""; 
 $("email_warn").innerhtml=""; 
 $("password_warn").innerhtml=""; 
 $("repassword_warn").innerhtml=""; 
} 
// 密码校验 
function checkpassword() { 
 var password1 = $("password").value; 
 if (password1.length >= 6 && password1.length <= 15) { 
  checkpasswordflag = true; 
  $("password_warn").style.color='blue'; 
  $("password_warn").innerhtml = " √ 密码可用 "; 
  checkagianmima(); 
 } else { 
  checkpasswordflag = false; 
  $("password_warn").innerhtml = " × 密码至少为 6 个字符 "; 
 } 
} 
function checkpasswordagian() { 
 var password1 = $("password").value; 
 var password2 = $("repassword").value; 
 if (password1 == password2) { 
  if (password1 == "") { 
   $("repassword_warn").innerhtml = " × 请输入密码 "; 
   checkpasswordagianflag = false; 
   return; 
  } 
  $("repassword_warn").style.color='blue'; 
  $("repassword_warn").innerhtml = "√ 重复输入密码正确"; 
  checkpasswordagianflag = true; 
 } else { 
  checkpasswordagianflag = false; 
  $("repassword_warn").innerhtml = " × 两次密码输入不同 "; 
 } 
} 
function checkemail(){ 
 //对电子邮件的验证 
  var myreg = /^([a-za-z0-9]+[_|\_|\.]?)*[a-za-z0-9]+@([a-za-z0-9]+[_|\_|\.]?)*[a-za-z0-9]+\.[a-za-z]{2,3}$/; 
  var email=$("email").value; 
  if(!myreg.test(email)){ 
   checkemailflag=false; 
    $("email_warn").style.color='red'; 
   $("email_warn").innerhtml = " × 邮箱格式不符合规范"; 
  } else { 
   checkemailflag=true; 
   $("email_warn").style.color='blue'; 
   $("email_warn").innerhtml = "√ 邮箱格式正确"; 
  } 
} 
function submitcheck(){ 
 alert(checkusernameflag); 
 if(checkusernameflag==false || checkpasswordflag==false || checkpasswordflag==false 
   ||checkpasswordagianflag==false || checkemailflag==false){ 
  return; 
 } 
} 
function $(id){ 
 return document.getelementbyid(id); 
} 

js正则表达式--验证表单

检测手机号码：/0?(13|14|15|18)[0-9]{9}/

检测用户名：（数字，英文，汉字，下划线，中横线）：/^[a-za-z0-9_\-\u4e00-\u9fa5]+$/

密码：（数字，英文，下划线，中横线）/^[a-za-z0-9_-]+$/

身份证：/\d{17}[\d|x]|\d{15}/

非空：/^\s+$/

ip地址：/((?:(?:25[0-5]|2[0-4]\d|[01]?\d?\d)\.){3}(?:25[0-5]|2[0-4]\d|[01]?\d?\d))/

以上所述是小编给大家介绍的js表单数据验证的正则表达式，希望对大家有所帮助