// JavaScript Document

MM_preloadImages('img/button-home.gif','img/button-corpsem.gif','img/button-edusem.gif','img/button-public.gif','img/button-who-med.gif','img/button-contact.gif');
		
addLoadListener(changeImg);	
addLoadListener(externalLinks);
function MM_preloadImages() { //v3.0
  var d=document; 
	if(d.images){ 
		if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=arguments; 
		for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ 
			d.MM_p[j]=new Image; 
			d.MM_p[j++].src=a[i];
		}
	}
}

function addLoadListener(fn){
	if (typeof window.addEventListener != 'undefined'){
		window.addEventListener('load', fn, false);
	}else if (typeof document.addEventListener != 'undefined'){
		document.addEventListener('load', fn, false);
	}else if (typeof window.attachEvent != 'undefined'){
		window.attachEvent('onload', fn);
	}else{
		var oldfn = window.onload;
		if (typeof window.onload != 'function'){
			window.onload = fn;
		}else{
			window.onload = function(){
				oldfn();
				fn();
			};
		}
	}
}

function changeImg(){
	var el = new Array('a', 'div', 'body', 'li', 'h1', 'h2', 'h3', 'html', 'p');
	var br = navigator.appName;
	if (typeof document.body.style.maxHeight == "undefined" && br == "Microsoft Internet Explorer") {
		ie6 = true;
		for(var i = 0;i < el.length;i++){
			bgImgReplace(el[i]);
		}
	}
}
function bgImgReplace(element){
	var el = document.getElementsByTagName(element);
	for(var i=0;i < el.length;i++){
		 var els = el[i].currentStyle.backgroundImage;
		 if(els.substr(0,3) == "url"){
			 if(els.substr(els.length-6,4) == ".png"){
					var newEls = els.replace(".png",".gif");
					el[i].style.backgroundImage = newEls;
			 }
		 }
	}
}
function externalLinks() { 
 if (!document.getElementsByTagName) return; 
 var anchors = document.getElementsByTagName("a"); 
 for (var i=0; i<anchors.length; i++) { 
   var anchor = anchors[i]; 
   if (anchor.getAttribute("href") && 
       anchor.getAttribute("rel") == "external") 
     anchor.target = "_blank"; 
 } 
}