function GetXmlHttpObject()
{ 
	var objXMLHttp=null;
	if (window.XMLHttpRequest)
	{
		objXMLHttp=new XMLHttpRequest()
	}
	else if (window.ActiveXObject)
	{
		objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP")
	}
		return objXMLHttp
}

//-----------------------------------------------



function getRoom(t,site)
{ 
	xmlHttp=GetXmlHttpObject()
	if (xmlHttp==null)
	{
		alert ("Browser does not support HTTP Request")
		return
	} 
	var url=site+"/view_room_cbo.php?tinh=" + t;
	
	xmlHttp.onreadystatechange=view_room_cbo 
	xmlHttp.open("GET",url,true)
	xmlHttp.send(null)
}


function view_room_cbo() 
{ 
	if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
	{
		var str=new String();
		str=xmlHttp.responseText;
		document.getElementById('cont_room').innerHTML=str
		
	}
}

function getDN(t)
{ 
	xmlHttp=GetXmlHttpObject()
	if (xmlHttp==null)
	{
		alert ("Browser does not support HTTP Request")
		return
	} 
	var url="view_doanhnghiep_cbo.php?dn_cat_id=" + t;
	
	xmlHttp.onreadystatechange=view_dn_cbo 
	xmlHttp.open("GET",url,true)
	xmlHttp.send(null)
}


function view_dn_cbo() 
{ 
	if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
	{
		var str=new String();
		str=xmlHttp.responseText;
		document.getElementById('doanhnghiep').innerHTML=str
		
	}
}