//清除字符串空格
function clearSpace(string){
	var temp = "";
	string = '' + string;
	splitstring = string.split(" ");
	for(i=0;i<splitstring.length;i++){
		temp += splitstring[i];
	}
	return temp;
}
//采用GET方法
function makeRequestGet(url,div){
	divName=div;
	if(window.XMLHttpRequest){
		request=new XMLHttpRequest();
		if(request.overrideMimeType){
			request.overrideMimeType('text/xml');
		}
	}
	else if(window.ActiveXObject){
		try{
			request=new ActiveXObject("Msxml2.XMLHTTP");
		}catch(e){
			try{
				request=new ActiveXObject("Microsoft.XMLHttp");
			}catch(e) {}
		} 
	}
	if(request){
		request.open('GET',url,true);//encodeURIComponent(username)
		request.onreadystatechange = callback;
		request.send(null);
	}
}
//采用POST方法
function makeRequestPost(url,str,div){
	divName = div;
	strName = str;
	if(window.XMLHttpRequest){
		request=new XMLHttpRequest();
		if(request.overrideMimeType){
			request.overrideMimeType('text/xml');
		}
	}
	else if(window.ActiveXObject){
		try{
			request=new ActiveXObject("Msxml2.XMLHTTP");
		}catch(e){
			try{
				request=new ActiveXObject("Microsoft.XMLHttp");
			}catch(e) {}
		} 
	}
	if(request){
		request.open('POST',url,true);
		request.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
		request.onreadystatechange = callback;
		request.send(strName);
	}
}
//回调函数
function callback(){
	if(request.readyState == 4){
		if(request.status == 200){
			GetMsg();
		}
		else{
			alert("服务端返回状态" + request.statusText);
		}
	}else{
		//document.getElementById (divName).innerHTML ="数据加载中";
	}
}