常用的几个JS验证函数

来源：互联网发布：sql server2000 编辑：程序博客网时间：2024/05/18 01:26

//判断字段必填(传入参数如：select,input,textarea)
function submitcheckvalue(obj) {
var j, i, obj, objs;
var tagnames = obj.split(",");
for (j = 0; j < tagnames.length; j++) {
  objs = document.all.tags(tagnames[j]);
  for (i = 0; i < objs.length; i++) {
   if ((objs[i].value == "" || objs[i].value == "0") && objs[i].type != "hidden") {
    alert("/u6570/u636e/u5f55/u5165/u4e0d/u5b8c/u6574/u6216/u5f55/u5165/u6570/u503c/u4e3a0/uff0c/u8bf7/u786e/u8ba4/u540e/u7ee7/u7eed!");
    objs[i].focus();
    return false;
   }
  }
}
return true;
}

//比较两个日期大小
function compareTwoDate(DateOne, DateTwo) {
var OneMonth = DateOne.substring(5, DateOne.lastIndexOf("-"));
var OneDay = DateOne.substring(DateOne.length, DateOne.lastIndexOf("-") + 1);
var OneYear = DateOne.substring(0, DateOne.indexOf("-"));
var TwoMonth = DateTwo.substring(5, DateTwo.lastIndexOf("-"));
var TwoDay = DateTwo.substring(DateTwo.length, DateTwo.lastIndexOf("-") + 1);
var TwoYear = DateTwo.substring(0, DateTwo.indexOf("-"));
if (Date.parse(OneMonth + "/" + OneDay + "/" + OneYear) > Date.parse(TwoMonth + "/" + TwoDay + "/" + TwoYear)) {
return true;
} else {
return false;
}
}

//只能输入字母和数字
function isNumberOrLetter() {
if (!((window.event.keyCode >= 65 && window.event.keyCode <= 90) || (window.event.keyCode >= 97 && window.event.keyCode <= 122) || (window.event.keyCode >= 48) && (window.event.keyCode <= 57))) {
window.event.keyCode = 0;
}
}

//只能输入汉字
function onlychinese() {
if ((window.event.keyCode >= 32) && (window.event.keyCode <= 126)) {
window.event.keyCode = 0;
}
}

//只能输入数字(不包含 - . )
function JHshNumberText() {
if (!(((window.event.keyCode >= 48) && (window.event.keyCode <= 57)) || (window.event.keyCode == 13) )) //包含 . 和 - 请添加 || (window.event.keyCode == 46) || (window.event.keyCode == 45)
{
window.event.keyCode = 0;
}
}

//只能输入数字
function JHshNumberTextpoint() {
if (!(((window.event.keyCode >= 48) && (window.event.keyCode <= 57)) || (window.event.keyCode == 13) || (window.event.keyCode == 46))) // || (window.event.keyCode == 45)
{
window.event.keyCode = 0;
}
}

//只能输入汉字及字母
function onlyCNEN(obj) {
var regu = "^[a-zA-Z/u4e00-/u9fa5]+$";
var re = new RegExp(regu);
if (re.test(obj.value)) {
return true;
}
alert("/u53ea/u80fd/u8f93/u5165/u6c49/u5b57/u6216/u5b57/u6bcd");
obj.value = "";
obj.focus();
return false;
}

//判断是否包含中文
function isChineseNo(obj) {
var name = obj.value;
if (name.length == 0) {
  return false;
}
for (i = 0; i < name.length; i++) {
  if (name.charCodeAt(i) > 128) {
   alert("/u4e0d/u80fd/u5305/u542b/u6c49/u5b57");
   obj.value = "";
   obj.focus();
   return true;
  }
}
return false;
}

//校验double类型
function checkIsDouble(obj) {
var str = obj.value;
if (str == "") {
  return true;
}
if(/^[0-9]+$/.test(str))
  return true;
var doublePat = /^(/d+)(.{1})(/d+)$/g;
if (doublePat.test(str)) {
  return true;
} else {
  alert("/u8f93/u5165/u6570/u636e/u4e0d/u5408/u6cd5/uff0c/u8bf7/u91cd/u65b0/u8f93/u5165");
  obj.value = "";
  obj.focus();
  return false;
}
}

//校验是否仅中文
function isChinese(obj){
var patrn = /[/u4E00-/u9FA5/uF900-/uFA2D]+$/;
if(!patrn.test(obj.value)){
alert("请您输入汉字！");
return;
}
//return patrn.test(obj.value);
}

//判断是否为空
function (obj) {
if (null == obj.value || "" == obj.value.trim()) {
return true;
} else {
return false;
}
}

//判断用户名：只能输入6-20个字母、数字、下划线(常用手校验用户名和密码)
function (obj) {
var patrn = /^(/w){6,20}$/;
return patrn.test(obj.value);
}

//判断电话号码
function isTelephone(obj) {
var patrn = /^(0[/d]{2,3}-)?/d{4,8}(-/d{3,4})?$/;
if(patrn.test(obj.value)){
    return true;
}else{
     alert("您输入的电话号码不正确，请重新输入！");
     obj.value="";
     return;
}
//return patrn.test(obj.value);
}

//判断密码强度
//CharMode函数
//测试某个字符是属于哪一类.
function CharMode(iN){
  if (iN>=48 && iN <=57) //数字
  return 1;
  if (iN>=65 && iN <=90) //大写字母
  return 2;
  if (iN>=97 && iN <=122) //小写
  return 4;
  else
  return 8; //特殊字符
}
//bitTotal函数
//计算出当前密码当中一共有多少种模式
function bitTotal(num){
  modes=0;
  for (i=0;i<4;i++){
  if (num & 1) modes++;
  num>>>=1;
  }
  return modes;
}
//checkStrong函数
//返回密码的强度级别
function checkStrong(sPW){
  if (sPW.length<=4)
  return 0; //密码太短
  Modes=0;
  for (i=0;i<sPW.length;i++){
  //测试每一个字符的类别并统计一共有多少种模式.
  Modes|=CharMode(sPW.charCodeAt(i));
}
return bitTotal(Modes);
}
//pwStrength函数
//当用户放开键盘或密码输入框失去焦点时,根据不同的级别显示不同的颜色

//校验密码强度
   function showstrong(v)
    {
        var ty;
        ty=0;
        numm=v.length;

        nums=v.replace(/[^0-9]/g,'').length;
        numz=v.replace(/[^a-zA-Z]/g,'').length;
        numt=numm-numz-nums;
        if (v.length<5)
        {
            str='密码位数小于5位！';
            ty=0;
        }
        else
        {
            if(numz<3&&numz>0){ty=ty+1;}
            if(numz>=3){ty=ty+2;}
            if(nums<3&&nums>0){ty=ty+1;}
            if(nums>=3){ty=ty+2;}
            if(numt<2&&numt>0){ty=ty+1;}
            if(numt>=2){ty=ty+2;}
            if(numm>10){ty=ty+1;}
        }
        switch(ty){
            case 1:
                str="弱"
                break;
            case 2:
                str="较弱"
                break;
            case 3:
                str="一般"
                break;
            case 4:
                str="一般"
                break;
            case 5:
                str="强"
                break;
            case 6:
                str="严密"
                break;
            case 7:
                str="很严密"
                break;
        }

    document.getElementById("passw").innerHTML=str;
    }