Ajax在Chrome，Firefox和&歌剧

问题描述

下面是我在主页面上的功能。这个代码在IE中工作正常，请检查我在哪里做错了

below is my function on main page.this code works fine in IE, please check where i am doing mistake

我只想将值传递给ajax页面你可以在上面看到我的链接。

i just want to pass values to ajax page as you can see my link above.

  function showUser2(str2)
  {

  if (str2=="")
    {
    document.getElementById("txtHint").innerHTML="";
    return;
    }
 if (window.XMLHttpRequest)
    {
    xmlhttp=new XMLHttpRequest();
    }
  else
    {
    xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
    }
  xmlhttp.onreadystatechange=function()
    {
    if (xmlhttp.readyState==4 && xmlhttp.status==200)
      {
      document.getElementById("txtHint").innerHTML=xmlhttp.responseText;
      }
    }

 var drdownValue = document.getElementsByName('shorting').item(0).value;
 var buttonValue1 = document.getElementsByName('buttonpassvalue1').item(0).value;

     var value = parseInt(document.getElementById('count').value, 10);
     value = isNaN(value) ? 0 : value;
     value++;
     document.getElementById('count').value = value;

var val123 = document.getElementById('count').value.trim();
var gotnumber = document.getElementById('getpagevalue').value.trim();

     if(val123 > gotnumber){
        buttonpassvalue1.setAttribute("disabled","disabled");
        buttonpassvalue.removeAttribute("disabled");

     }    else{
        buttonpassvalue.removeAttribute("disabled");
        buttonpassvalue1.removeAttribute("disabled");
     }

 alert(drdownValue);// to check click and value
 alert(buttonValue1);// to check click and value

 xmlhttp.open("GET", "productlistajax.php?q=" + drdownValue + "&version1=" + buttonValue1, true);

 xmlhttp.send();
  }

按钮html代码

<button class="button" type="button" name="buttonpassvalue1" value="1" onclick="showUser2(this.value)">Next >> </button>

此代码在IE中运行正常，请检查我在哪里做错了

this code works fine in IE, please check where i am doing mistake

我只想将值传递到ajax页面，因为你可以看到我上面的链接。

i just want to pass values to ajax page as you can see my link above.

谢谢

推荐答案

我建议使用jQuery或其他框架，它将始终了解所有特定于浏览器的东西。

I recommend to use jQuery or other framework, that will be always aware of all the browsers specific stuff.

如果您更喜欢使用本机代码，则需要一些额外的代码。首先，不要仅仅依赖于 ActiveXObject（Microsoft.XMLHTTP）; 和 XMLHttpRequest ，它们可能永远不可用。而不是那样，使用：

If you prefer to use native code, you will need some extra code. First, dont rely just in ActiveXObject("Microsoft.XMLHTTP"); and XMLHttpRequest that probably wont be always available. instead of that, use:

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;
}

var xmlhttp=GetXmlHttpObject();

然后你定义你的回调：

 xmlhttp.onreadystatechange=function()
    {
    if (xmlhttp.readyState==4 && xmlhttp.status==200)
      {
      document.getElementById("txtHint").innerHTML=xmlhttp.responseText;
      }
    }

并发送它，但我会包含一个随机变量在网址中，以确保浏览器不缓存任何内容

and send it, but i would include a random variable in the url, to ensure that the browser is not caching anything

xmlHttp.open("GET",url+"&sid="+Math.random(),true);
xmlHttp.send(null);

无论如何，可能你的问题与ajax本身无关，并且可能在你的代码中还有其他东西会导致一切崩溃。

Anyways, probably your problem has nothing to do with the ajax itself, and probably there is something else in your code causing everything to crash.

例如，看一下chrome控制台，我确定你会有一些有用的信息错误日志。如果您不知道如何，请在这里

For example, take a look at the chrome console, and im sure you will have some useful informtion in the error log. if you dont know how, here you have a guide

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