这是我用来验证整数或浮点值的数字输入(不显眼的jQuery风格):

$('input[name="number"]').keyup(function(e) { var float = parseFloat($(this).attr('data-float')); /* 2 regexp for validating integer and float inputs ***** > integer_regexp : allow numbers, but do not allow leading zeros > float_regexp : allow numbers + only one dot sign (and only in the middle of the string), but do not allow leading zeros in the integer part *************************************************************************/ var integer_regexp = (/[^0-9]|^0+(?!$)/g); var float_regexp = (/[^0-9\.]|^\.+(?!$)|^0+(?=[0-9]+)|\.(?=\.|.+\.)/g); var regexp = (float % 1 === 0) ? integer_regexp : float_regexp; if (regexp.test(this.value)) { this.value = this.value.replace(regexp, ''); } }); <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <input type="text" data-float="1" id="number" name="number" placeholder="integer"> <input type="text" data-float="0.1" id="number" name="number" placeholder="float">

使用jQuery.validate做一些相当简单的事情

$(document).ready(function() {
    $("#formID").validate({
        rules: {
            field_name: {
                numericOnly:true
            }
        }
    });
});

$.validator.addMethod('numericOnly', function (value) {
       return /^[0-9]+$/.test(value);
}, 'Please only enter numeric values (0-9)');

只需要在Jquery中应用此方法，您可以验证您的文本框只接受数字。

function IsNumberKeyWithoutDecimal(element) {    
var value = $(element).val();
var regExp = "^\\d+$";
return value.match(regExp); 
}

试试这个解决方案

我想帮点忙，我做了我的版本，onlyNumbers函数…

function onlyNumbers(e){
    var keynum;
    var keychar;

    if(window.event){  //IE
        keynum = e.keyCode;
    }
    if(e.which){ //Netscape/Firefox/Opera
        keynum = e.which;
    }
    if((keynum == 8 || keynum == 9 || keynum == 46 || (keynum >= 35 && keynum <= 40) ||
       (event.keyCode >= 96 && event.keyCode <= 105)))return true;

    if(keynum == 110 || keynum == 190){
        var checkdot=document.getElementById('price').value;
        var i=0;
        for(i=0;i<checkdot.length;i++){
            if(checkdot[i]=='.')return false;
        }
        if(checkdot.length==0)document.getElementById('price').value='0';
        return true;
    }
    keychar = String.fromCharCode(keynum);

    return !isNaN(keychar);
}

只需添加输入标签“…输入……id="price" onkeydown="return onlyNumbers(event)"…"然后你就完成了;)

function Numbers(e)
{
    if($.browser.msie)
    {
        if(e.keyCode > 47 && e.keyCode < 58)
            return true;
        else
            return false;
    }
    else
    {
        if((e.charCode > 47 && e.charCode < 58) || (e.charCode == 0))
            return true;
        else
            return false;
    }
}

我希望这在所有浏览器上都能工作。

function suppressNonNumericInput(event){
        if( !(event.keyCode == 8                                // backspace
            || event.keyCode == 46                              // delete
            || (event.keyCode >= 35 && event.keyCode <= 40)     // arrow keys/home/end
            || (event.keyCode >= 48 && event.keyCode <= 57)     // numbers on keyboard
            || (event.keyCode >= 96 && event.keyCode <= 105))   // number on keypad
            ) {
                event.preventDefault();     // Prevent character input
        }
    }