function getSub(str)
{

var xmlHttp;
var page;

page = "/getSub.php?id="+str; 

//alert(page);

try
  {  // Firefox, Opera 8.0+, Safari  
  xmlHttp=new XMLHttpRequest();  
  }
catch (e)
  {  // Internet Explorer  
  try
    {    
	xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");    
	}
	catch (e)
    {    
	try
      {      
		xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");     
	  }
    catch (e)
      {      
	  alert("Your browser does not support AJAX!");     
	  return false;      
	  }    
	}  
  }
	
	xmlHttp.onreadystatechange=function()
    {
    if(xmlHttp.readyState==4)
      {
        document.getElementById('navigationsub').innerHTML=xmlHttp.responseText;
      }
	else
	  {
		document.getElementById('navigationsub').innerHTML=''
		//document.getElementById('box1').innerHTML="Loading data....";
	  }	
    }
	
 xmlHttp.open("GET", page, true);
 xmlHttp.send(null);  
  
}