function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      if (oldonload) {
        oldonload();
      }
      func();
    }
  }
}

addLoadEvent(externalLinks);
//addLoadEvent(function() {
  /* more code to run on page load */ 
//});

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"; 
 } 
}


function show(id) {
	if (document.layers) document.layers[id].visibility = "show";
	else if (document.all) document.all[id].style.visibility = "visible";
	else if (document.getElementById) document.getElementById(id).style.visibility = "visible";
}
function hide(id) {
	if (document.layers) document.layers[id].visibility = "hide";
	else if (document.all) document.all[id].style.visibility = "hidden";
	else if (document.getElementById) document.getElementById(id).style.visibility = "hidden";
}

function MM_findObj(n, d) { //v4.01
			var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
					 d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
			if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
			for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
		if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}
	
				
function filled(field) {
	if (field.value == "" || field.value == null) {
		return false;
	} else {
		return true;
	}
}

var contactForm;

//Initialization function
function validateContactForm() {
	//Attaching the onSubmit event to the login form
	contactForm = document.getElementById('contact');
	contactForm.onsubmit = function () {
		canSubmitContact(this);
	}
	
	//Setting focus to the user field
	contactForm.name.focus();
}


function canSubmitContact(form) {
	if (!filled(form.name)) {
		alert("Please enter your name.");
		form.name.focus();
		return false;
	}
	
	if (!filled(form.email)) {
		alert("Please enter your email address.");
		form.email.focus();
		return false;
	}

	if (!filled(form.country)) {
		alert("Please enter your country.");
		form.country.focus();
		return false;
	}

	if (!filled(form.comments)) {
		alert("Please enter your comments.");
		form.comments.focus();
		return false;
	}

	return true;
}



function launchPreview(address) {
		void(window.open(address,'preview','height=600,width=700,resizable=yes,scrollbars=yes'));
		return false;
	}