var allmenu = new Array("first","map","second","contact","webmaster");
var nowmenu = "first";
function showpage(filename) {
	document.getElementById("mainpage").innerHTML = "<span style='background-color:#FFFFFF'><img src='images/spinner.gif'/> กำลังโหลดข้อมูล..</span>";
	for ( var i=0; i<allmenu.length; i++) {
		document.getElementById("menu_"+allmenu[i]).style.backgroundImage = 'url(images/tab_butt1.gif)';
	}
	document.getElementById("menu_"+filename).style.backgroundImage = 'url(images/tab_butt0.gif)';
	makeHttpRequest("ajax/page/"+filename+".php", "mainpage_callback", false);
	var today = new Date();
	var expire = new Date();
 	expire.setTime(today.getTime() + 3600000*24*1);
	document.cookie = "page="+escape(nowmenu)+ ";expires="+expire.toGMTString()+";path=/";
	nowmenu=filename;
/*	if ( nowmenu == "map" )
		document.getElementById("mainpage").style.backgroundImage = '';
	else document.getElementById("mainpage").style.backgroundImage = 'url(images/firstpage_01.png)';*/
}
function showlink(linkname) {
	document.getElementById("mainpage").innerHTML = "<span style='background-color:#FFFFFF'><img src='images/spinner.gif'/> กำลังโหลดข้อมูล..</span>";
	makeHttpRequest(linkname, "mainpage_callback", false);
	var today = new Date();
	var expire = new Date();
 	expire.setTime(today.getTime() + 3600000*24*1);
	document.cookie = "page="+escape(nowmenu)+ ";expires="+expire.toGMTString()+";path=/";
	nowmenu='link:'+linkname;
}
function mainpage_callback(responseText) {
	document.getElementById("mainpage").innerHTML = responseText;
	if ( nowmenu == "map" ) {
		init();
	}
}