# js校验form表单大合集

js校验form表单集锦

本人在工作中遇到的各种js校验表单方法大合集，希望对自己对各位同行有所帮助（目前遇到的就是这些，以后遇到其他的还会持续更新）：

---

限定只能输入数字：　
（在input标签后面直接校验）

<input type="text" name="sum" size="10" onkeyup="if(event.keyCode !=37 && event.keyCode != 39){if (!/^[\d]+$/ig.test(this.value)){this.value='';}}"/>　

（单独的方法校验）

function checkNumber(){
    var text=$("numberid").val()
    (text.search(/^\d+$/g) == -1) {
        check.style.color = "red";
        check.innerText = "应为纯数字!";
    }
}

手机号码格式校验：

var ab = /^1[3|4|5|7|8]\d{9}$/;
var phone=$("#phoneid").val();
if (ab.test(phone) == false) {
   alert("手机号码格式不正确");
}

密码只能是数字和字母：

var abc = /^[A-Za-z0-9]+$/;
var password=$("#passwordid").val();
if (abc.test(password) == false) {
   alert("密码格式不正确");
}

密码等级的校验：

function checkPassword(){
    text=$("passwd_rigester_input").val();
    var check = $("passwdCheck_label");

    if (text == "") {
        check.style.color = "red";
        check.innerText = "密码项不能为空!";
    }
    //密码中只能有数字、字母和标点符号
    else if (text.split(" ").length != 1) {
        check.style.color = "red";
        check.innerText = "密码中不能出现空格!";
    }
    else {
        //验证密码的安全级数,纯数字或纯字母或纯标点为1级，字母+数字为2级，字母或数字任意一个+标点为3级

        if ((text.search(/^[a-zA-Z]+$/g) != -1) || (text.search(/^[0-9]+$/g) != -1)) {
            check.style.color = "yellow";
            check.innerText = "密码安全级别为1级!";
        }
        else if (text.search(/^[a-zA-Z0-9]+$/g) != -1) {
            check.style.color = "yellow";
            check.innerText = "密码安全级别为2级!";
        }
        else {
            check.style.color = "yellow";
            check.innerText = "密码安全级别为3级!";
        }
    }
}

确认密码：

function configPassword(){
    text = document.getElementById("confirmPasswd_input").value;
    var check = document.getElementById("confirmPasswdCheck_label");
    if (text != document.getElementById("passwd_rigester_input").value) {
        check.style.color = "red";
        check.innerText = "两次密码输入不一致!";
    }
    else {
        check.style.color = "yellow";
        check.innerText = "密码确认正确!";
    }
}

银行卡输入四位一个空格格式化：

<td class="ar">卡号:</td>
<td><input class="ip-text" type="text" id="cardno" name="UB_CARDNO" value=""/></td>
<td></td>

$("#cardno").keydown(function(e) {
   if(!isNaN(this.value.replace(/[ ]/g,""))){
       this.value =this.value.replace(/\s/g,'').replace(/(\d{4})(?=\d)/g,"$1 ");//四位数字一组，以空格分割
   }else{
       if(e.keyCode==8){//当输入非法字符时，禁止除退格键以外的按键输入
           return true;
       }else{
           return false
       }
   }
});

去除字符串中的所有空格(第二个参数为g)：

function Trim(str,is_global)
{
   var result;
   result = str.replace(/(^\s+)|(\s+$)/g,"");
   if(is_global.toLowerCase()=="g")
   {
       result = result.replace(/\s/g,"");
   }
   return result;
}

金额格式化：

/**
 * 将数值四舍五入(保留2位小数)后格式化成金额形式
 *
 * @param num 数值(Number或者String)
 * @return 金额格式的字符串,如'1,234,567.45'
 * @type String
 */
function formatCurrency(num) {
    num = num.toString().replace(/\$|\,/g,'');
    if(isNaN(num))
        num = "0";
    sign = (num == (num = Math.abs(num)));
    num = Math.floor(num*100+0.50000000001);
    cents = num%100;
    num = Math.floor(num/100).toString();
    if(cents<10)
        cents = "0" + cents;
    for (var i = 0; i < Math.floor((num.length-(1+i))/3); i++)
        num = num.substring(0,num.length-(4*i+3))+','+
                num.substring(num.length-(4*i+3));
    return (((sign)?'':'-') + num + '.' + cents);
}

/**
 * 将数值四舍五入(保留1位小数)后格式化成金额形式
 *
 * @param num 数值(Number或者String)
 * @return 金额格式的字符串,如'1,234,567.4'
 * @type String
 */
function formatCurrencyTenThou(num) {
    num = num.toString().replace(/\$|\,/g,'');
    if(isNaN(num))
        num = "0";
    sign = (num == (num = Math.abs(num)));
    num = Math.floor(num*10+0.50000000001);
    cents = num%10;
    num = Math.floor(num/10).toString();
    for (var i = 0; i < Math.floor((num.length-(1+i))/3); i++)
        num = num.substring(0,num.length-(4*i+3))+','+
                num.substring(num.length-(4*i+3));
    return (((sign)?'':'-') + num + '.' + cents);
}

// 添加金额格式化    
jQuery.extend({
    formatFloat:function(src, pos){
        var num = parseFloat(src).toFixed(pos);
        num = num.toString().replace(/\$|\,/g,'');
        if(isNaN(num)) num = "0";
        sign = (num == (num = Math.abs(num)));
        num = Math.floor(num*100+0.50000000001);
        cents = num%100;
        num = Math.floor(num/100).toString();
        if(cents<10) cents = "0" + cents;
        for (var i = 0; i < Math.floor((num.length-(1+i))/3); i++)
            num = num.substring(0,num.length-(4*i+3))+','+num.substring(num.length-(4*i+3));
        return (((sign)?'':'-') + num + '.' + cents);
    }
});