if (document.layers) window.captureEvents(Event.CONTEXTMENU);
document.oncontextmenu =  function(){displayKeyAction('oncontextmenu');return false};

window.onload = function(){
	MM_preloadImages('images/header/btn_intro_f2.jpg','images/header/btn_scope_f2.jpg','images/header/btn_knowledge_f2.jpg','images/header/btn_contact_f2.jpg','images/header/btn_join_f2.jpg','images/header/btn_blog_f2.jpg');
	//Event.observe(window, 'contextmenu', contextmenuListener, false); 
	
	//if (0){
	browser=navigator.appName;
	b_version=navigator.appVersion;
	version=parseFloat(b_version);
	if (browser=="Microsoft Internet Explorer"){
		$('htmlbody').observe('mousedown', mouseActionListener, false); 
		$('htmlbody').observe('mouseup', mouseActionListener, false); 
		$('htmlbody').observe('dragstart', mouseActionListener, false); 
		$('htmlbody').observe('selectstart', mouseActionListener, false); 
		$('htmlbody').observe('keypress', disableCtrlKeyCombination, false); 
		$('htmlbody').observe('keydown', disableCtrlKeyCombination, false); 
	}else{
		Event.observe(window, 'mousedown', mouseActionListener, false); 
		Event.observe(window, 'mouseup', mouseActionListener, false); 
		Event.observe(window, 'dragstart', mouseActionListener, false); 
		Event.observe(window, 'selectstart', mouseActionListener, false); 
		Event.observe(window, 'keypress', disableCtrlKeyCombination, false); 
		Event.observe(window, 'keydown', disableCtrlKeyCombination, false); 
	}
}
function contextmenuListener(event){
	displayKeyAction('contextmenu');
	return false;
}
function mouseActionListener(event) {   
	switch (Event.element(event).tagName.toLowerCase()) {
		case 'input':case 'select': case 'textarea':
			return true;
		break;
		default:
			Event.stop(event);
			return false;
		break;
	}
}
function displayKeyAction(str){
	document.getElementById('keyaction').value=str;
}
function disableCtrlKeyCombination(event){
	//list all CTRL + key combinations you want to disable
	disableCTRLkeys = new Array('a', 'n', 'c', 'x', 'v', 'j', 's', 'u');
	var key;
	var isCtrl;
	
	switch (Event.element(event).tagName) {
		case 'INPUT':case 'SELECT': case 'TEXTAREA':
			return true;
		break;
		default:
			isCtrl = event.ctrlKey;
			key = event.keyCode;
			if (key==0 || key == null|| key==undefined)	key = event.charCode;
			//if ctrl is pressed check if other key is in forbidenKeys array
			if(isCtrl){
				for(i=0; i<disableCTRLkeys.length; i++){
					//case-insensitive comparation
					if(disableCTRLkeys[i].toLowerCase() == String.fromCharCode(key).toLowerCase()){
						displayKeyAction('Ctrl-'+String.fromCharCode(key)+' pressed');
						Event.stop(event);
						return false;
					}
				}
			} else {
				displayKeyAction(''+String.fromCharCode(key)+' pressed');
			}
			return false;
		break;
	}
	return true;
}




/*********************************** for image swaping **************************************************/
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 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=MM_preloadImages.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 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];}
}