<input type="button" class="body" id="subm" name="subm" value="写好了，发布出去" 
onclick="chkfull(this)"/>//注意类型是“按钮” 
<input type="hidden" id="userchksense" name="userchksense" value="?"/>//嵌入一个隐藏的文本框，给Ajax传值 
 
Ajax的Javascript部分 
 代码如下:

function chkfull(bt){ 
var content = document.getElementById("usercontent").value; 
if(content=="") 
{ 
    alert("正文为必填。");//判断文章内容是否为空 
    return false; 
} 
else 
{ 
    var xHRObject=false; 
    if(window.XMLHttpRequest)//判断浏览器内核 
    { 
        xHRObject=new XMLHttpRequest(); 
    } 
    else if(window.ActiveXObject) 
    { 
        xHRObject= new ActiveXObject("Microsoft.XMLHTTP"); 
    } 
    function get2()//定义get2函数，给onreadystatechange做准备。本函数不能放在xHRObject.onreadystatechange=get2;的后面 
    { 
        if(xHRObject.readyState==4 && xHRObject.status==200) 
        { 
            var serverText=xHRObject.responseText; 
            if(serverText=="sense") 
            { 
                if(confirm("你的文章有敏感词汇，确定要发布吗？\n\r【是，发布】将被审核，请等待。\n\r【否，不发布】将返回界面，请修改字句。")) 
                { 
                    bt.value="正在提交"; 
                    bt.disabled=true;//关闭按钮 
                    document.getElementById("userchksense").value="sense";//改变userchksense的值为sense，这样，post到add.php就能直接检查是否要锁定本文，而不用再次检查文章 
                    document.form1.submit();//提交该表单 
                } 
                else//好像有点多余，不过这样比较保险 
                return false; 
            }     
            else 
            { 
                bt.value="正在提交"; 
                bt.disabled=true; 
                document.getElementById("userchksense").value="nonsense"; 
                document.form1.submit(); 
            } 
        } 
    } 
     
    var title=document.getElementById("usertitle").value; 
    var tag=document.getElementById("usertag").value; 
    var intro=document.getElementById("userintro").value; 
    var content=document.getElementById("usercontent").value; 
     
    var v = "title="+title+"&tag="+tag+"&intro="+intro+"&content="+content; 
    xHRObject.open("POST","../ajax/ajax.php",true);     
    xHRObject.setRequestHeader("Content-Type","application/x-www-form-urlencoded"); 
    xHRObject.onreadystatechange=get2;//此处的get2不能打括号，否则是将函数的返回值赋值给一个变量，而不是将本函数本身赋值给xHRObject.onreadystatechange（注释1） 
    xHRObject.send(v); 
} 
} 

 
 




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