function ahah(url, target) {
  document.getElementById(target).innerHTML = ' <!--fetching -->';
  if (window.XMLHttpRequest) {
    req = new XMLHttpRequest();
  } else if (window.ActiveXObject) {
    req = new ActiveXObject("Microsoft.XMLHTTP");
  }
  if (req != undefined) {
    req.onreadystatechange = function() {ahahDone(url, target);};
    req.open("GET", url, true);
    req.send("");
  }
}  

function ahahDone(url, target) {
  if (req.readyState == 4) { // only if req is "loaded"
    if (req.status == 200) { // only if "OK"
      document.getElementById(target).innerHTML = req.responseText;
    } else {
      document.getElementById(target).innerHTML=" AHAH Error:\n"+ req.status + "\n" +req.statusText;
    }
  }
}

function load(name, div) {
	ahah(name,div);
	return false;
}

function page_change(page, name, div){
	document.getElementById('contact_cell').className = 'table_cells';
	document.getElementById('about_cell').className = 'table_cells';
	document.getElementById('lines_cell').className = 'table_cells';
	document.getElementById('resources_cell').className = 'table_cells';
	document.getElementById('lines_a').className = 'table';

	if(page!='home'){
	target = page + '_cell';
	document.getElementById(target).className = target;
	}
	
	if(page=='lines'){
		anchor = page + '_a';
		document.getElementById(anchor).className = anchor;	
	}

	load(name,div);
}