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Example summary of JS form verification method [telephone ID number Email Chinese special characters ID number etc.]

  • 2021-07-21 05:59:41
  • OfStack

This paper summarizes the JS form verification method with examples. Share it for your reference, as follows:

Back to write the form, back to write a different check JS, very troublesome, later wrote a general check function, very rough, but more practical, and then a good change:

Include pages: Check-Form. js

The code is as follows: 


// Rule check sorting 
function RegCheck(objs)
{
 var str = objs.checktype;
 switch (str)
  {
    case "cn" :  // The input type of the form control to be checked must be Chinese 
     return CnWordRegCheck(objs);
     break;
    case "idnum" :
     return IdCardRegCheck(objs); // The input type of the form control to be checked must be ID number 
     break;
  case "num" :  // The input type of the form control to be checked must be numeric 
      return NumRegCheck(objs);
   break;
  case "mail" :  // The input type of the form control to be checked must be EMAIL
     return EmailRegCheck(objs);
     break;
  case "txt" :  // The input type of the form control to be checked must be a string 
   return SpecialWordRegCheck(objs);
   break;
  case "notes" :
   return true; // The input type of the form control to be checked must be everything 
   break;
  }
}
//************************************************
// Check the telephone number 
function NumRegCheck(obj)
{
 var uplimit = obj.checkrule.split(",")[0];
 var downlimit = obj.checkrule.split(",")[1];
 var reg = "";
 if (downlimit == null)
  {
   reg = eval_r("/^[0-9]{"+uplimit+"}$/");
  }
 else
  {
   reg = eval_r("/^[0-9]{"+uplimit+","+downlimit+"}$/");
  }
 var str = obj.value;
 var flag = reg.test(str);
 return flag;
}
//************************************************
// Check ID number 
function IdCardRegCheck(obj)
{
 var str = obj.value;
 var reg = /^([0-9]{15}|[0-9]{18})$/;
 var flag = reg.test(str);
 return flag;
}
//************************************************
// Check EMAIL
function EmailRegCheck(obj)
{
 var str = obj.value;
 var reg = /^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+((\.[a-zA-Z0-9_-]{2,3}){1,2})$/;
 var flag = reg.test(str);
 return flag;
}
//***************************************
// Check Chinese input 
function CnWordRegCheck(obj)
{
 var str = obj.value;
 var reg=/^[\u4e00-\u9fa5](\s*[\u4e00-\u9fa5])*$/;
 var flag = reg.test(str);
 //alert(flag);
 return flag;
}
//***************************************
// Check for special characters 
function SpecialWordRegCheck(obj)
{
 var reg= /[(\/)(<)(>)]/g">\\)(')(")(<)(>)]/g;
 var str = obj.value;
 var flag= reg.test(str);
 flag = !flag;
 return flag;
}
//************************************************
// Check the main boot function 
function CheckForm(obj)
{
 var myform = eval_r("document."+obj.name);
 for (i=0;i<myform.elements.length;i++)
  {
  var formvalue = myform.elements[i].value;
  // Content non-null check , Length check 
  if ((myform.elements[i].value == "")||(myform.elements[i].value.length>myform.elements[i].maxlength))
   {
   alert(" You forgot to fill in "+myform.elements[i].cnname+"!"+" Or the information you fill in does not conform to the specification !");
   myform.elements[i].focus();
   return false;
   break;
   }
   if (myform.elements[i].value == 0)
   {
   alert(" You forgot to choose "+myform.elements[i].cnname+"!");
   myform.elements[i].focus();
   return false;
   break;
   }
  // Data normalization check 
  var myobj = myform.elements[i];
  //alert(myobj.checktype);
  //break;
  if (!RegCheck(myobj))
   {
   alert(myobj.cnname+" Input error , Please fill in according to the filling requirements !");
    myobj.focus();
   return false;
   break;
   }
  }
}

Attachment: Strict verification of js ID number 


<script>
function checkIdcard(idcard){
var Errors=new Array(
"验证通过!",
"身份证号码位数不对!",
"身份证号码出生日期超出范围或含有非法字符!",
"身份证号码校验错误!",
"身份证地区非法!"
);
var area={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:"4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"}
var idcard,Y,JYM;
var S,M;
var idcard_array = new Array();
idcard_array = idcard.split("");
//地区检验
if(area[parseInt(idcard.substr(0,2))]==null) return Errors[4];
//身份号码位数及格式检验
switch(idcard.length){
case 15:
if ( (parseInt(idcard.substr(6,2))+1900) % 4 == 0 || ((parseInt(idcard.substr(6,2))+1900) % 100 == 0 && (parseInt(idcard.substr(6,2))+1900) % 4 == 0 )){
ereg=/^[1-9][0-9]{5}[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|[1-2][0-9]))[0-9]{3}$/;//测试出生日期的合法性
} else {
ereg=/^[1-9][0-9]{5}[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|1[0-9]|2[0-8]))[0-9]{3}$/;//测试出生日期的合法性
}
if(ereg.test(idcard)) return Errors[0];
else return Errors[2];
break;
case 18:
//18位身份号码检测
//出生日期的合法性检查
//闰年月日:((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|[1-2][0-9]))
//平年月日:((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|1[0-9]|2[0-8]))
if ( parseInt(idcard.substr(6,4)) % 4 == 0 || (parseInt(idcard.substr(6,4)) % 100 == 0 && parseInt(idcard.substr(6,4))%4 == 0 )){
ereg=/^[1-9][0-9]{5}19[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|[1-2][0-9]))[0-9]{3}[0-9Xx]$/;//闰年出生日期的合法性正则表达式
} else {
ereg=/^[1-9][0-9]{5}19[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|1[0-9]|2[0-8]))[0-9]{3}[0-9Xx]$/;//平年出生日期的合法性正则表达式
}
if(ereg.test(idcard)){//测试出生日期的合法性
//计算校验位
S = (parseInt(idcard_array[0]) + parseInt(idcard_array[10])) * 7
+ (parseInt(idcard_array[1]) + parseInt(idcard_array[11])) * 9
+ (parseInt(idcard_array[2]) + parseInt(idcard_array[12])) * 10
+ (parseInt(idcard_array[3]) + parseInt(idcard_array[13])) * 5
+ (parseInt(idcard_array[4]) + parseInt(idcard_array[14])) * 8
+ (parseInt(idcard_array[5]) + parseInt(idcard_array[15])) * 4
+ (parseInt(idcard_array[6]) + parseInt(idcard_array[16])) * 2
+ parseInt(idcard_array[7]) * 1
+ parseInt(idcard_array[8]) * 6
+ parseInt(idcard_array[9]) * 3 ;
Y = S % 11;
M = "F";
JYM = "10X98765432";
M = JYM.substr(Y,1);//判断校验位
if(M == idcard_array[17]) return Errors[0]; //检测ID的校验位
else return Errors[3];
}
else return Errors[2];
break;
default:
return Errors[1];
break;
}
}
alert(checkIdcard("220183198808081610"))
</script>

PS: Here are two very convenient regular expression tools for your reference:

JavaScript Regular Expression Online Test Tool:
http://tools.ofstack.com/regex/javascript

Regular expression online generation tool:
http://tools.ofstack.com/regex/create_reg

More readers interested in JavaScript can check out the topics of this site: "JavaScript Regular Expression Skills Encyclopedia", "JavaScript Replacement Operation Skills Summary", "JavaScript Search Algorithm Skills Summary", "JavaScript Data Structure and Algorithm Skills Summary", "JavaScript Traversal Algorithm and Skills Summary", "json Operation Skills Summary in JavaScript", "JavaScript Error and Debugging Skills Summary" and "JavaScript Mathematical Operation Usage Summary"

I hope this article is helpful to everyone's JavaScript programming.

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