javascript正则表达式检验

原创 她让我换网名 译文 技巧 304阅读 2017-08-31 14:46:39 举报

//校验是否全由数字组成
function isDigit(s)
{
var patrn=/^[0-9]{1,20}$/;
if (!patrn.exec(s)) return false
return true
}

//校验登录名:只能输入5-20个以字母开头、可带数字、“”、“.”的字串
function isRegisterUserName(s)
{
var patrn=/^[a-zA-Z]{1}([a-zA-Z0-9]|[.
]){4,19}$/;
if (!patrn.exec(s)) return false
return true
}

//校验用户姓名:只能输入1-30个以字母开头的字串
function isTrueName(s)
{
var patrn=/^[a-zA-Z]{1,30}$/;
if (!patrn.exec(s)) return false
return true
}

//校验密码:只能输入6-20个字母、数字、下划线
function isPasswd(s)
{
var patrn=/^(\w){6,20}$/;
if (!patrn.exec(s)) return false
return true
}

//校验普通电话、传真号码:可以“+”开头,除数字外,可含有“-”
function isTel(s)
{
//var patrn=/^[+]{0,1}(\d){1,3}[ ]?([-]?(\d){1,12})+$/;
var patrn=/^[+]{0,1}(\d){1,3}[ ]?([-]?((\d)|[ ]){1,12})+$/;
if (!patrn.exec(s)) return false
return true
}

//校验手机号码:必须以数字开头,除数字外,可含有“-”
function isMobil(s)
{
var patrn=/^[+]{0,1}(\d){1,3}[ ]?([-]?((\d)|[ ]){1,12})+$/;
if (!patrn.exec(s)) return false
return true
}

//校验邮政编码
function isPostalCode(s)
{
//var patrn=/^[a-zA-Z0-9]{3,12}$/;
var patrn=/^[a-zA-Z0-9 ]{3,12}$/;
if (!patrn.exec(s)) return false
return true
}

//校验搜索关键字
function isSearch(s)
{
var patrn=/^[^~!@#$%^&*()+=|\\\][\]\{\}:;\'\,.<>/?]{1}[^~!@$%^&()+=|\\][]{}:;\'\,.<>?]{0,19}$/;
if (!patrn.exec(s)) return false
return true
}

function isIP(s) //by zergling
{
var patrn=/^[0-9.]{1,20}$/;
if (!patrn.exec(s)) return false
return true
}

//验证val是(true)否(false)在lo和hi之间
function isBetween (val, lo, hi) {
if ((val < lo) || (val > hi)) { return(false); }
else { return(true); }
}

//检查theStr是(true)否(false)是一个有效的日期
function isDate (theStr) {
var the1st = theStr.indexOf('-');
var the2nd = theStr.lastIndexOf('-');

if (the1st == the2nd) { return(false); }
else {
var y = theStr.substring(0,the1st);
var m = theStr.substring(the1st+1,the2nd);
var d = theStr.substring(the2nd+1,theStr.length);
var maxDays = 31;

if (isInt(m)==false || isInt(d)==false || isInt(y)==false) {
return(false); }
else if (y.length < 4) { return(false); }
else if (!isBetween (m, 1, 12)) { return(false); }
else if (m==4 || m==6 || m==9 || m==11) maxDays = 30;
else if (m==2) {
if (y % 4 > 0) maxDays = 28;
else if (y % 100 == 0 && y % 400 > 0) maxDays = 28;
else maxDays = 29;
}
if (isBetween(d, 1, maxDays) == false) { return(false); }
else { return(true); }
}
}

//检查theStr是否是英文日期格式下的有效日期
function isEuDate (theStr) {
if (isBetween(theStr.length, 8, 10) == false) { return(false); }
else {
var the1st = theStr.indexOf('/');
var the2nd = theStr.lastIndexOf('/');

if (the1st == the2nd) { return(false); }
else {
var m = theStr.substring(the1st+1,the2nd);
var d = theStr.substring(0,the1st);
var y = theStr.substring(the2nd+1,theStr.length);
var maxDays = 31;

if (isInt(m)==false || isInt(d)==false || isInt(y)==false) {
return(false); }
else if (y.length < 4) { return(false); }
else if (isBetween (m, 1, 12) == false) { return(false); }
else if (m==4 || m==6 || m==9 || m==11) maxDays = 30;
else if (m==2) {
if (y % 4 > 0) maxDays = 28;
else if (y % 100 == 0 && y % 400 > 0) maxDays = 28;
else maxDays = 29;
}

if (isBetween(d, 1, maxDays) == false) { return(false); }
else { return(true); }
}
}

}

//比较两个日期那个是最新的,如果lessDate<moreDate返回true,否则返回false
function isComdate (lessDate , moreDate)
{
if (!isDate(lessDate)) { return(false);}
if (!isDate(moreDate)) { return(false);}
var less1st = lessDate.indexOf('-');
var less2nd = lessDate.lastIndexOf('-');
var more1st = moreDate.indexOf('-');
var more2nd = moreDate.lastIndexOf('-');
var lessy = lessDate.substring(0,less1st);
var lessm = lessDate.substring(less1st+1,less2nd);
var lessd = lessDate.substring(less2nd+1,lessDate.length);
var morey = moreDate.substring(0,more1st);
var morem = moreDate.substring(more1st+1,more2nd);
var mored = moreDate.substring(more2nd+1,moreDate.length);
var Date1 = new Date(lessy,lessm,lessd);
var Date2 = new Date(morey,morem,mored);
if (Date1>Date2) { return(false);}
return(true);

}

//检查参数是否为空
function isEmpty (str) {
if ((str==null)||(str.length==0)) return true;
else return(false);
}

//检查参数是否是Integer类型
function isInt (theStr) {
var flag = true;

if (isEmpty(theStr)) { flag=false; }
else
{ for (var i=0; i<theStr.length; i++) {
if (isDigit(theStr.substring(i,i+1)) == false) {
flag = false; break;
}
}
}
return(flag);
}

/*****

  • FUNCTION: isReal
  • PARAMETER: heStr AS String
    decLen AS Integer (how many digits after period)
  • RETURNS: TRUE if theStr is a float, otherwise FALSE
  • CALLS: isInt
    **/
    function isReal (theStr, decLen) {
    var dot1st = theStr.indexOf('.');
    var dot2nd = theStr.lastIndexOf('.');
    var OK = true;

if (isEmpty(theStr)) return false;

if (dot1st == -1) {
if (!isInt(theStr)) return(false);
else return(true);
}

else if (dot1st != dot2nd) return (false);
else if (dot1st==0) return (false);
else {
var intPart = theStr.substring(0, dot1st);
var decPart = theStr.substring(dot2nd+1);

if (decPart.length > decLen) return(false);
else if (!isInt(intPart) || !isInt(decPart)) return (false);
else if (isEmpty(decPart)) return (false);
else return(true);
}
}

//检验参数是否是一个有效的Email地址
function isEmail (theStr) {
var atIndex = theStr.indexOf('@');
var dotIndex = theStr.indexOf('.', atIndex);
var flag = true;
theSub = theStr.substring(0, dotIndex+1)

if ((atIndex < 1)||(atIndex != theStr.lastIndexOf('@'))||(dotIndex < atIndex + 2)||(theStr.length <= theSub.length))
{ return(false); }
else { return(true); }
}

/**

  • FUNCTION: newWindow
  • PARAMETERS: doc -> Document to open in the new window
    hite -> Height of the new window
    wide -> Width of the new window
    bars -> 1-Scroll bars = YES 0-Scroll Bars = NO
    resize -> 1-Resizable = YES 0-Resizable = NO
  • CALLS: NONE
  • RETURNS: New window instance
    ***/
    function newWindow (doc, hite, wide, bars, resize) {
    var winNew="_blank";
    var opt="toolbar=0,location=0,directories=0,status=0,menubar=0,";
    opt+=("scrollbars="+bars+",");
    opt+=("resizable="+resize+",");
    opt+=("width="+wide+",");
    opt+=("height="+hite);
    winHandle=window.open(doc,winNew,opt);
    return;
    }

/*****

  • FUNCTION: DecimalFormat
  • PARAMETERS: paramValue -> Field value
  • CALLS: NONE
  • RETURNS: Formated string
    ****/
    function DecimalFormat (paramValue) {
    var intPart = parseInt(paramValue);
    var decPart =parseFloat(paramValue) - intPart;

str = "";
if ((decPart == 0) || (decPart == null)) str += (intPart + ".00");
else str += (intPart + decPart);

return (str);
}

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