function ajax_get_content(file,content_id){
	//构造地址
	//创建ajax对象
	 var ajaxObj = null;
		 if(window.XMLHttpRequest){
			 ajaxObj = new XMLHttpRequest();
		 } else if(window.ActiveXObject){
			 ajaxObj = new ActiveXObject("Microsoft.XMLHTTP");
		 } else {
			return;
		 }
	 //状态变化
	 ajaxObj.onreadystatechange = function(){
		 if(ajaxObj.readyState == 4){
			document.getElementById(content_id).innerHTML=ajaxObj.responseText;
		 }else{
			document.getElementById(content_id).innerHTML="<div style=\"height:24px; width:450px; text-align:center;  float:left\"><img src=\"images/icon/loading_1.gif\" width=\"20\" height=\"20\" align=\"absmiddle\" />加载中...</div>";
		 }
	 }
	 
	 ajaxObj.open ('GET',file, true);
	 ajaxObj.send ('');
}

//获取返回值
function ajax_select(file,s_id){
	//构造地址
	//创建ajax对象
	 var ajaxObj = null;
		 if(window.XMLHttpRequest){
			 ajaxObj = new XMLHttpRequest();
		 } else if(window.ActiveXObject){
			 ajaxObj = new ActiveXObject("Microsoft.XMLHTTP");
		 } else {
			return;
		 }
	 //状态变化
	 ajaxObj.onreadystatechange = function(){
		 if(ajaxObj.readyState == 4){
			 //获取后触发
			var a=ajaxObj.responseText;//异步获得的值
			var n=document.getElementById(s_id);
			var m_array=a.split(",");
				//先清空select
				n.length=0;
				for(var i=0;i<m_array.length-1;i++){
				//分离出ID 和VALUE;
				var m_b=m_array[i].split("|");
				//alert(m_b[1]);
				//添加到select中
				n.options[n.length]=new Option(m_b[1],m_b[0]);
		}
		 }else{
				//n.options[n.length]=new Option(0,"加载中...");
		 }
	 }
	 
	 ajaxObj.open ('GET',file, true);
	 ajaxObj.send ('');
}