public.js

企业内部的短信交流管理平台。 设计详细

var http_request=false;
function send_request(url)
{
	http_request=false;
	
	if(window.XMLHttpRequest)
	{
		http_request =new XMLHttpRequest();
		if(http_request.overrideMimeType)
		{
			http_request.overrideMimeType="text/xml";
		}
	}
	else if(window.ActiveXObject)
	{
		try
		{
			http_request=new ActiveXObject("Msxml2.XMLHTTP");	
		}catch(e){
			http_request=new ActiveXObject("Microsoft.XMLHTTP");
		}
	}
	
	if(!http_request)
	{
		window.alert("创建XML对象失败！");
		return false;
	}
	
	http_request. onreadystatechange=processRequest;
	
	//发送post请求
	//http_request.setRequestHeader("Content-Type","application/x-www-form-urlencoded");	
	//http_request.open("POST",url,true);	
	//http_request.send(postdata);
	////postdata格式： name=zs&pwd=888&age=22
	
	http_request.open("GET",url,true);
	http_request.setRequestHeader("If-Modified-Since","0");
	http_request.send(null);
}

function processRequest()
{
	if(http_request.readyState==4)//对象状态(integer):0 = 未初始化;1 = 读取中;2 = 已读取;3 = 交互中;4 = 完成
	{
		if(http_request.status==200)//服务器返回的状态码, 如：404 = "文件末找到" 、200 ="成功"
		{
            pro(http_request);			
		}
		else
		{
            alert("服务器处理错误！" + http_request.statusText);
		}
	}
}