字符串验证js

「爱情、让人受尽委屈。」 2022-07-12 11:29 133阅读 0赞

//去除空格
    function jsTrim(value) {
        var reg = /^\S$/;
        if (!value) return "";
        if (value.length == 0)
            return value;
        else {
            var lp, rp;
            lp = 0; rp = value.length - 1;
            while ((value.charAt(lp) == " " || (value.charCodeAt(lp) < 128 ? (reg.test(value.charAt(lp)) == false ? true : false) : false) || value.charAt(rp) == " " || (value.charCodeAt(rp) < 128 ? (reg.test(value.charAt(rp)) == false ? true : false) : false)) && rp >= lp) {
                if (value.charAt(lp) == " " || value.charCodeAt(lp) < 128 ? (reg.test(value.charAt(lp)) == false ? true : false) : false)
                    lp++;
                if (value.charAt(rp) == " " || value.charCodeAt(rp) < 128 ? (reg.test(value.charAt(rp)) == false ? true : false) : false)
                    rp--;
            }
            if (lp > rp)
                return "";
            else
                return (value.substring(lp, rp + 1));
    
        }
    }
    //字符串长度
    function strlength(s) {
        var s_length = s.length;
        return s_length;
    }
    
    //手机号码验证函数
    String.prototype.Trim = function() {
        var m = this.match(/^\s*(\S+(\s+\S+)*)\s*$/);
        return (m == null) ? "" : m[1];
    }
    String.prototype.isMobile = function() {
        return (/^(?:13\d|15\d|18\d|19\d|17\d|14\d)-?\d{5}(\d{3}|\*{3})$/.test(this.Trim()));
    }
    //*判别电话号码，手机号是否有效
    
    
    //*返回 true:false
    
    
    //*/
    function checkPhone(phone)    
    {    
    //验证电话号码手机号码，包含153，159号段    
    if (phone==""){    
    alert("电话号码不能为空！");     
    return false;    
    }    
    if (phone != ""){     
    var p1 = /^(([0\+]\d{2,3}-)?(0\d{2,3})-)?(\d{7,8})(-(\d{3,}))?$/;    
    var me = false;    
    if (p1.test(phone)) me=true;    
    if (!me){       
    //alert('对不起，您输入的电话号码有错误。区号和电话号码之间请用-分割');      
    return false;    
    }    
    }   
    return true;    
    }    
    
    //邮箱地址验证函数
    function checkmail(mail) {
    //    var strr;
    //    re = /(\w+@\w+\.\w+)(\.{0,1}\w*)(\.{0,1}\w*)/i;
    //    re.exec(mail);
    //    if (RegExp.$3 != "" && RegExp.$3 != "." && RegExp.$2 != ".")
    //        strr = RegExp.$1 + RegExp.$2 + RegExp.$3
    //    else {
    //        if (RegExp.$2 != "" && RegExp.$2 != ".")
    //            strr = RegExp.$1 + RegExp.$2
    //        else
    //            strr = RegExp.$1
    //    }
    //    if (strr != mail) { return false } else { return true }
        //    return true;
        var remail = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
        return mail.match(remail);
    }
    //判断数字
    function CheckNumber(n) {
        var checkOK = "0123456789-.";
        var allValid = true;
        var decPoints = 0;
        var allNum = "";
        for (i = 0; i < n.length; i++) {
            ch = n.charAt(i);
            for (j = 0; j < checkOK.length; j++)
                if (ch == checkOK.charAt(j))
                break;
            if (j == checkOK.length) {
                allValid = false;
                break;
            }
            if (ch == ".") {
                allNum += ".";
                decPoints++;
            }
            else
                allNum += ch;
        }
        if (!allValid)
            return false;
        if (decPoints > 1)
            return false;
        return true;
    }
    //判断数字
    function CheckN(n) {
        var checkOK = "0123456789";
        var allValid = true;
        var decPoints = 0;
        var allNum = "";
        for (i = 0; i < n.length; i++) {
            ch = n.charAt(i);
            for (j = 0; j < checkOK.length; j++)
                if (ch == checkOK.charAt(j))
                break;
            if (j == checkOK.length) {
                allValid = false;
                break;
            }
            if (ch == ".") {
                allNum += ".";
                decPoints++;
            }
            else
                allNum += ch;
        }
        if (!allValid)
            return false;
        if (decPoints > 1)
            return false;
        return true;
    }
    var g_MINY = 1601;
    var g_MAXY = 4500;
    var rgMC = new Array(12);
    rgMC[0] = 31; rgMC[1] = 28; rgMC[2] = 31; rgMC[3] = 30; rgMC[4] = 31; rgMC[5] = 30; rgMC[6] = 31; rgMC[7] = 31; rgMC[8] = 30; rgMC[9] = 31; rgMC[10] = 30; rgMC[11] = 31;
    function isdigit(c) {
        return (c >= '0' && c <= '9');
    }
    function GetMonthCount(m, y) {
        var c = rgMC[m - 1];
        if ((2 == m) && IsLeapYear(y)) c++;
        return c;
    }
    function atoi(s) {
        var t = 0;
        for (var i = 0; i < s.length; i++) {
            var c = s.charAt(i);
            if (!isdigit(c)) return t;
            else t = t * 10 + (c - '0');
        }
        return t;
    }
    //判断日期
    function CheckDate(t) {
        var l = t.length;
        if (0 == l) return false;
        var cSp = '\0';
        var sSp1 = '';
        var sSp2 = '';
        for (var i = 0; i < t.length; i++) {
            var c = t.charAt(i);
            if (c == ' ' || isdigit(c)) continue;
            else if (cSp == '\0' && (c == '/' || c == '-' || c == '.')) {
                cSp = c;
                sSp1 = t.substring(i + 1, l);
            }
            else if (c == cSp) sSp2 = t.substring(i + 1, l);
            else if (c != cSp) return false;
        }
        if (0 == sSp1.length) return false;
        var m;
        var d;
        var y;
        if (0 == sSp2.length) return false;
        m = atoi(sSp1);
        d = atoi(sSp2);
        y = atoi(t);
        if (y < 100) {
            y = 1900 + y;
            while (y < g_yLow) y = y + 100;
        }
        if (y < g_MINY || y > g_MAXY || m < 1 || m > 12) return false;
        if (d < 1 || d > GetMonthCount(m, y)) return false;
        g_month = m;
        g_day = d;
        g_year = y;
        return true;
    }
    //验证字符串必须为数字字母组合
    function isNumAndStr(elem){
           var str = elem.value; 
         var regexpUperStr=/[A-Z]+/;
         var reexpLowerStr=/[a-z]+/;
         var regexpNum=/\d+/;
         var uperStrFlag = regexpUperStr.test(str);
         var lowerStrFlag = reexpLowerStr.test(str);
         var numFlag = regexpNum.test(str);
         if((uperStrFlag&&lowerStrFlag)||(lowerStrFlag&&numFlag)||(uperStrFlag&&numFlag))
             return true;
         else
            return false;
    }
    //验证字符串必须为数字跟字母的组合    
    function checkPSW(str) {
    
        if (str != "") {
            var p1 = /(?!^[0-9]*$)(?!^[a-zA-Z]*$)^([a-zA-Z0-9]{2,})$/;
            var me = false;
            if (p1.test(str)) me = true;
            if (!me) {
                return false;
            }
        }
        return true;
    }
    //验证字符串必须为数字跟字母的组合    
    function checklen(str) {
    
        if (str.length < 8 ) {
                return false;
            }
        return true;
    }
    //单价
    function ISprice(v) {
        var Mreg = /^[0-9]{1,10}(\.[0-9]{1,3})?$/;
        if (Mreg.test(v)) {
            return true;
        }
        else {
            return false;
        }
    }