function   cepost(url,address)     
{     
//获取接受返回信息层
//alert(p1.value);
	var msg = address;
	//获取表单对象和用户信息值
//var f = document.form;
//var p1=form.p1.value;

var varone = document.gb.title.value;
var vartwo = document.gb.g_name.value;
var varthree = document.gb.pic;
for(i=0;i<varthree.length;i++)
{
	if(varthree[i].checked)
	{
		var img = varthree[i].value;
		}	
}
var varfour  = document.gb.content.value;
//接收表单的URL地址
//需要POST的值，把每个变量都通过&来联接
var postStr   = "varone="+varone+"&vartwo="+vartwo+"&img="+img+"&varfour="+varfour;

//实例化Ajax
//var ajax = InitAjax();


          var ajax = false;
         //开始初始化XMLHttpRequest对象
         if(window.XMLHttpRequest) { //Mozilla 浏览器
                 ajax = new XMLHttpRequest();
                 if (ajax.overrideMimeType) {//设置MiME类别
                         ajax.overrideMimeType("text/xml");
                 }
         }
         else if (window.ActiveXObject) { // IE浏览器
                 try {
                         ajax = new ActiveXObject("Msxml2.XMLHTTP");
                 } catch (e) {
                         try {
                                 ajax = new ActiveXObject("Microsoft.XMLHTTP");
                         } catch (e) {}
                 }
         }
         if (!ajax) { // 异常，创建对象实例失败
                 window.alert("不能创建XMLHttpRequest对象实例.");
                 return false;
         }
//通过Post方式打开连接


ajax.open("POST", url, true); 

   //定义传输的文件HTTP头信息
//ajax.setrequestheader("content-length",postStr.length);//
ajax.setRequestHeader("Content-Type","application/x-www-form-urlencoded"); 

//发送POST数据
ajax.send(postStr);

//获取执行状态
ajax.onreadystatechange = function() 
	{ 
   //如果执行状态成功，那么就把返回信息写到指定的层里
   		if (ajax.readyState == 4 && ajax.status == 200) 
		{ 
    		document.getElementById(msg).innerHTML = ajax.responseText; 
   		} 
	} 
}