function setTab(n)
{
    var nli=document.getElementById("commtab").getElementsByTagName("a");
    for(i=0;i<nli.length;i++){
        nli[i].className=i==n?"comm1":"";
        document.getElementById('d'+i).style.display=i==n?'block':'none';
    }
}

function GetXmlHttpObject()
{
	var xmlHttp=null;
	try{xmlHttp=new XMLHttpRequest();}/* Firefox, Opera 8.0+, Safari*/
	catch (e){
		try{xmlHttp=new ActiveXObject("Msxml2.XMLHTTP"); }/* Internet Explorer*/
		catch (e){xmlHttp=new ActiveXObject("Microsoft.XMLHTTP"); }
		}
	return xmlHttp;
}

function SendMessage()
{
	var username=document.getElementById('username').value;
	var content=document.getElementById('message').value;
	
	var url="/company/sendmessage.aspx?CName="+username+"&Message="+content+"&ran="+Math.random();
	 xmlHttp=GetXmlHttpObject();
	 if (xmlHttp==null)
		{
			alert("您的浏览器不支持AJAX,请更换浏览器后再试");
			return;
		}
	
	 xmlHttp.onreadystatechange=SendFinish;
	 xmlHttp.open("GET",url,true);
	 xmlHttp.send(null);	
}
function SendFinish()
{
	if (xmlHttp.readyState==4)
	{
		  var rtext =xmlHttp.responseText.toString();
		  if(rtext=="0")
				alert("消息有误,发送失败!");
		　else
				alert("你的留言已发送成功！");
		
	}	
}