// here we define global variable
var ajaxdestination="";

function simpleGet(what, where) {
	try
	{
		 xmlhttp = window.XMLHttpRequest?new XMLHttpRequest():
				new ActiveXObject("Microsoft.XMLHTTP");
	}
	catch (e)
	{
	 	/* do nothing */ 
	}
	
	ajaxdestination=where;
	xmlhttp.onreadystatechange = triggered; // when request finished, call the function to put result to destination DIV
	xmlhttp.open("GET", what);
	xmlhttp.send(null);
	return false;
}

function triggered() { // put data returned by requested URL to selected DIV
  if (xmlhttp.readyState == 4) if (xmlhttp.status == 200) 
    document.getElementById(ajaxdestination).innerHTML =xmlhttp.responseText;
}

function openwindow(url, width, height) {
    var recommend_page = encodeURI(document.location);
    var myRef = window.open(url + "?recommend_page=" + recommend_page, "mywin", "left=20,top=20,width=" + width + ",height=" + height + ",toolbar=0,status=0,location=0");
}

function leaveSite( newURL ) {
	var result = confirm('You have selected a link to a website that exists outside of the Viramune.com Web site. Boehringer Ingelheim Pharmaceuticals, Inc. provides access to these sites as a service to Viramune.com visitors, and is not responsible or liable for the content and information presented within any external site.');
	if (result)
		window.open(newURL);
	return false;
}

function addEvent( obj, type, fn ) {
  if ( obj.attachEvent ) {
    obj["e"+type+fn] = fn;
    obj[type+fn] = function() { obj["e"+type+fn]( window.event ); }
    obj.attachEvent( "on"+type, obj[type+fn] );
  } else
    obj.addEventListener( type, fn, false );
}

function removeEvent( obj, type, fn ) {
  if ( obj.detachEvent ) {
    obj.detachEvent( "on"+type, obj[type+fn] );
		obj[type+fn] = null;
  } else
    obj.removeEventListener( type, fn, false );
}

function externalLinks() {
	if (document.getElementById) {
		// Find all links
		var links = document.getElementsByTagName('a');
		var link;
		for (var i = 0; i < links.length; i++) {
			link = links[i];
			if(link.getAttribute('rel') == 'external' || 
                link.href.substring(0, 10) == 'http://www' || 
                link.href.substring(0, 13) == 'http://dasis3' || 
                link.href.substring(0, 10) == 'http://kap') {
				if (link.getAttribute('rel') != 'safe')
				{
					links[i].onclick = function() { 
						return leaveSite(this.href); 
						}
				}
			}
		}
		// Now find all image map links
		var areas = document.getElementsByTagName('area');
		var area;
		for (var i = 0; i < areas.length; i++) {
			area = areas[i];
			if (area.getAttribute('href').substring(0, 10) == 'http://www') {
				areas[i].onclick = function() { 
					return leaveSite(this.getAttribute('href')); 
					}
			}
		}
	}
}

function adjustNavHeight()
{
	var contentHeight = document.getElementById('content').clientHeight + 80;
	var nav = document.getElementById('nav');
	nav.style.height = contentHeight + "px";
}

addEvent(window, 'load', externalLinks);
addEvent(window, 'load', adjustNavHeight);