function validate_profile(frmid) {
    var form = $('#' + frmid);
    var error = $('.alert-danger', form);
    var success = $('.alert-success', form);
    form.validate({
        errorElement: 'span', //default input error message container
        errorClass: 'help-block', // default input error message class
        focusInvalid: true, // do not focus the last invalid input
        ignore: "",
        rules: {
            contact_no: {
                required: true,
                minlength: 10,
                maxlength: 10,
                number: true
            }, email_id: {
                required: true,
                email: true
            }
        },
        invalidHandler: function (event, validator) { //display error alert on form submit   
            success.hide();
            error.show();
            Metronic.scrollTo(error, -7000);
        },
        highlight: function (element) { // hightlight error inputs
            $(element)
                    .closest('.form-group').addClass('has-error'); // un set error class to the control group
            $(element)
                    .closest('.form-group').removeClass('has-success'); // set success class to the control group
        },
        unhighlight: function (element) { // revert the change done by hightlight
            $(element)
                    .closest('.form-group').removeClass('has-error'); // un set error class to the control group
            $(element)
                    .closest('.form-group').addClass('has-success'); // set success class to the control group
            error.hide();
        },
        success: function (label) {
            label.closest('.form-group').removeClass('has-error');
            label.closest('.form-group').addClass('has-success');
        },
        submitHandler: function (form) {
            success.show();
            error.hide();
            form.submit();
        }
    });
}

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

你可以使用这个JavaScript函数:

function maskInput(e) {
    //check if we have "e" or "window.event" and use them as "event"
        //Firefox doesn't have window.event 
    var event = e || window.event 

    var key_code = event.keyCode;
    var oElement = e ? e.target : window.event.srcElement;
    if (!event.shiftKey && !event.ctrlKey && !event.altKey) {
        if ((key_code > 47 && key_code < 58) ||
            (key_code > 95 && key_code < 106)) {

            if (key_code > 95)
                 key_code -= (95-47);
            oElement.value = oElement.value;
        } else if(key_code == 8) {
            oElement.value = oElement.value;
        } else if(key_code != 9) {
            event.returnValue = false;
        }
    }
}

你可以像这样把它绑定到你的文本框:

$(document).ready(function() {
    $('#myTextbox').keydown(maskInput);
});

我在生产中使用了上面的方法，它工作得很好，而且是跨浏览器的。此外，它不依赖于jQuery，所以你可以用内联JavaScript将它绑定到你的文本框:

<input type="text" name="aNumberField" onkeydown="javascript:maskInput()"/>

简短而甜蜜——即使在30多个答案之后，这一点永远不会得到太多关注;)

  $('#number_only').bind('keyup paste', function(){
        this.value = this.value.replace(/[^0-9]/g, '');
  });

需要确保你有数字键盘和tab键工作

 // Allow only backspace and delete
            if (event.keyCode == 46 || event.keyCode == 8  || event.keyCode == 9) {
                // let it happen, don't do anything
            }
            else {
                // Ensure that it is a number and stop the keypress
                if ((event.keyCode >= 48 && event.keyCode <= 57) || (event.keyCode >= 96 && event.keyCode <= 105)) {

                }
                else {
                    event.preventDefault();
                }
            }

重构了已接受的答案，因此不再需要使用注释，因为我讨厌注释。这也更容易用茉莉花进行测试。

    allowBackspaceDeleteTabEscapeEnterPress: function(event){
    return ($.inArray(event.keyCode, [46, 8, 9, 27, 13, 190]) >= 0);
},
allowContorlAPress: function(event){
    return (event.keyCode == 65 && event.ctrlKey === true)
},
allowHomeEndLeftRightPress: function(event){
    return (event.keyCode >= 35 && event.keyCode <= 39)
},
theKeyPressedIsEditRelated: function (event) {
    return (this.allowBackspaceDeleteTabEscapeEnterPress(event)
            || this.allowContorlAPress(event)
            || this.allowHomeEndLeftRightPress(event));
},
isNotFromTheNumKeyPad: function (event) {
    return (event.keyCode < 96 || event.keyCode > 105);
},
isNotFromTopRowNumberKeys: function (event) {
    return (event.keyCode < 48 || event.keyCode > 57);
},
theKeyIsNonNumeric: function (event) {
   return (event.shiftKey
           || (this.isNotFromTopRowNumberKeys(event)
                && this.isNotFromTheNumKeyPad(event)));
},
bindInputValidator: function(){
    $('.myinputclassselector').keydown(function (event) {
        if(this.validateKeyPressEvent(event)) return false;
    });
},
validateKeyPressEvent: function(event){
    if(this.theKeyPressedIsEditRelated(event)){
        return;
    } else {
        if (this.theKeyIsNonNumeric(event)) {
            event.preventDefault();
        }
    }
}