Question

点击提交按钮时, ajax 工作, php 页面被调用( 没有刷新), 但按下键时, 刷新页面, 脚本不工作, 只有 < code>? txtname=( INPUTED TEXT) 出现在页面 URL 末尾。

ajax 代码 :

var time_variable;
var root2 = location.protocol +  //  + location.host +  /testing.php ;

function getXMLObject()  //XML OBJECT
{
   var xmlHttp = false;
   try {
     xmlHttp = new ActiveXObject("Msxml2.XMLHTTP")  // For Old Microsoft Browsers
   }
   catch (e) {
     try {
       xmlHttp = new ActiveXObject("Microsoft.XMLHTTP")  // For Microsoft IE 6.0+
     }
     catch (e2) {
       xmlHttp = false   // No Browser accepts the XMLHTTP Object then false
     }
   }var root = location.protocol +  //  + location.host;
   if (!xmlHttp && typeof XMLHttpRequest !=  undefined ) {
     xmlHttp = new XMLHttpRequest();        //For Mozilla, Opera Browsers
   }
   return xmlHttp;  // Mandatory Statement returning the ajax object created
}

var xmlhttp = new getXMLObject();   //xmlhttp holds the ajax object

function ajaxFunction() {
  var getdate = new Date();  //Used to prevent caching during ajax call
  if(xmlhttp) {
    var txtname = document.getElementById("txtname");
    xmlhttp.open("POST",root2,true); //calling testing.php using POST method
    xmlhttp.onreadystatechange  = handleServerResponse;
    xmlhttp.setRequestHeader( Content-Type ,  application/x-www-form-urlencoded );
    xmlhttp.send("txtname=" + txtname.value); //Posting txtname to PHP File
  }
}

function handleServerResponse() {
   if (xmlhttp.readyState == 4) {
     if(xmlhttp.status == 200) {
       document.getElementById("message").innerHTML=xmlhttp.responseText; //Update the HTML Form element
     }
     else {
        alert("Error during AJAX call. Please try again");
     }
   }
}

html 部分 :

<body>
<form name="myForm">
<table>
 <tr>
  <td>Enter Name</td>
  <td><input type="text" name="txtname" id="txtname" value="<?php echo $f ?>" /></td>
 </tr>
 <tr>
  <td colspan="2"><input type="button" value="Submit" onclick="ajaxFunction();" /></td>
 </tr>
</table>
</form>
<div id="message" name="message"></div>
</body>

Answer 1

您需要将 onsumbit 属性添加到您的窗体 :

<form name="myForm" onsubmit="ajaxFunction(); return false;">

return fraud; 是指防止页面更新(即实际提交而不是ajax)。

Answer 2

应用程序来提交窗体,而不是单击按钮

<form name="myForm" onsubmit="ajaxFunction();">

您的函数将以此方式在任何情形下工作, 通过输入或按键单击提交表单。

Answer 3

替换

<form name="myForm">

与

<form name="myForm" onsubmit="ajaxFunction();return false;">

because the form will submit itself 与GET method on the page itself 与ENTER unless you define what to do on ENTER keypress.

友情链接