我正在使用此代码来验证邮政编码。该代码就像一个魅力,但我想在提交之前验证输入并确保输入仅为数字。我将此添加到代码中:
Code1- 验证数字输入的代码
 function validateForm() {
     var x = document.forms["form2"]["postal"].value;
     if(/[^0-9]+$/.test(x)) {
         alert("The postcode must have ONLY numeric characters - Please go to contact page if you live outside Australia.");
         myformName.myformField.focus();
         return false;
     }
 }
但不幸的是它不起作用。有没有人可以帮我解决这个问题?我想知道如何将上面的代码集成到下面的代码中:
code2 - 主要代码
$(document).ready(function () {
    $('#tab-container').easytabs();
});
var xmlHttp;
function check() {
    xmlHttp = GetXmlHttpObject();
    if(xmlHttp == null) {
        alert("Browser does not support HTTP Request");
        return;
    }
    var code = document.getElementById("postal").value;
    document.getElementById("loader4").style.visibility = 'visible';
    var url = "Ajax/check_code.php";
    url = url + "?p=" + code;
    //alert(code);
    xmlHttp.onreadystatechange = stateChanged;
    xmlHttp.open("GET", url, true);
    xmlHttp.send(null);
    function stateChanged() {
        if(xmlHttp.readyState == 4 || xmlHttp.readyState == "complete") {
            //alert(xmlHttp.responseText);
            if(xmlHttp.responseText == 1) {
                //alert(xmlHttp.responseText);
                //document.getElementById("pro").disabled = false; 
                window.location.href = 'booking.html';
            } else if(xmlHttp.responseText == 0) {
                document.getElementById("results").style.visibility = 'visible';
                document.getElementById("results").innerHTML = 'Alert Message';
            }
            document.getElementById("loader4").style.visibility = 'hidden';
        }
    }
}
function GetXmlHttpObject() {
    var xmlHttp = null;
    try {
        // Firefox, Opera 8.0+, Safari
        xmlHttp = new XMLHttpRequest();
    } catch(e) {
        //Internet Explorer
        try {
            xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
        } catch(e) {
            xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
        }
    }
    return xmlHttp;
}
这是HTML:
<form name="form2" onsubmit="return validateForm();">
    <label>STEP 1:</label>
    <label>Enter Your Post Code</label>
    <input type="text" name="postal" placeholder="e.g. 4000" id="postal"  />
    <input type="button" class="call-to-action" name="pro" id="pro" onclick="check()" value="Book Now" />
</form>
所以我想再次在 code2 中添加 code1 并获得数字验证。