// JavaScript Document

var xmlHttp;

function getXmlHttpObject(){

	var objXMLHttp=null;

	if(window.XMLHttpRequest){

 		objXMLHttp=new XMLHttpRequest();

 	}else if(window.ActiveXObject){

 		objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP");

 	}

 	return objXMLHttp;

}



function getContents(page_path,link_id,max_link_id){

	xmlHttp=getXmlHttpObject();

	if(xmlHttp==null){

		alert("Your browser has to be updated.");

		return;

	}else{

		var url=""+page_path+"";

		xmlHttp.onreadystatechange=loadContents;

		for(c=1;c<=max_link_id;c++){

			if(c==link_id){

				document.getElementById(c).className="link_sel";

			}else{

				document.getElementById(c).className="link";	

			}

		}

		xmlHttp.open("GET",url,true);

		xmlHttp.send(null);

	}		

}

function loadContents(){

	if(xmlHttp.readyState!=4){

		document.getElementById('main_contents').innerHTML='Loading...';

	}

	if(xmlHttp.readyState==4){

		document.getElementById('main_contents').innerHTML=xmlHttp.responseText;		

	}

}