function logon(){
	if (document.login.username.value=="") {
	alert("U bent vergeten uw gebruikersnaam in te vullen");
	return false}
	if (document.login.password.value=="") {
	alert("U bent vergeten uw wachtwoord in te vullen");
	return false}
}

function mouseDown(e) {
	var ctrlPressed=0;
	var altPressed=0;
	//a = document.getElementById("divContentLeft")
	b = document.getElementById("divContentRight")

	 if (parseInt(navigator.appVersion)>3) {
	  if (navigator.appName=="Netscape") {
	   var mString =(e.modifiers+32).toString(2).substring(3,6);
	   ctrlPressed =(mString.charAt(1)=="1");
	   altPressed  =(mString.charAt(2)=="1");
	   self.status="modifiers="+e.modifiers+" ("+mString+")"
	  }
	  else {
	   altPressed  =event.altKey;
	   ctrlPressed =event.ctrlKey;
	  }

	   if(ctrlPressed){
		  // 	a.contentEditable 	= false;
			b.contentEditable 	= false;
		   }
		  else{
		  // 	a.contentEditable 	= true;
			b.contentEditable 	= true;
		  }
	 }
}


	document.onmousedown 	= showDisclaimerByRight;
	document.onmouseup 		= showDisclaimerBySelection;
	document.onkeydown		= showDisclaimerByKeyTouch;
	//document.captureEvents(Event.showDisclaimer);


function detectTextSelection()
{
	var a = document.selection.createRange()
	if(a.text.length > 0 ){a.text = "";return true}
}

function mouseButton(){
	var whichButton = event.button;
	return whichButton;
}

function showDisclaimerByRight()
{
	if(mouseButton() == 2){showDisclaimer();}
}

function showDisclaimerBySelection()
{
	if(detectTextSelection() == true){showDisclaimer();}
}

function showDisclaimerByKeyTouch()
{
	   altPressed  =event.altKey;
	   ctrlPressed =event.ctrlKey;
	   if(altPressed || ctrlPressed){showDisclaimer();}
}