var currentactivelayer;
var currentactivesub;

function setcontent(elmnt){
	// verander naar aktieve tab
	document.getElementById(elmnt).className='tab_on';
	
	// eerste keer dat geklikt wordt
	if(!currentactivelayer){
		var childlayer=elmnt+'_sub';
		document.getElementById(childlayer).style.display='inline';
	}
	// wisselen van aktieve tabs/content:
	else{
		if(currentactivelayer!=elmnt){
		var childlayer=elmnt+'_sub';
		document.getElementById(childlayer).style.display='inline';
		document.getElementById(currentactivesub).style.display='none';
		document.getElementById(currentactivelayer).className='tab';
		}
	}
	// fotoslider iframe legen
	if(elmnt != 'fotoslider'){
		document.getElementById('fotoslider_frame').src='/blank.html';
	}
	currentactivelayer=elmnt;
	currentactivesub=elmnt+'_sub';
}

function launch(theURL,winName,features, myWidth, myHeight, isCenter) { //v3.0
  if(window.screen)if(isCenter)if(isCenter=="true"){
    var myLeft = (screen.width-myWidth)/2;
    var myTop = (screen.height-myHeight)/2;
    features+=(features!='')?',':'';
    features+=',left='+myLeft+',top='+myTop;
  }
  openen=window.open(theURL,winName,features+((features!='')?',':'')+'width='+myWidth+',height='+myHeight);
  openen.focus();
}

function ci(elmnt,state){
	document.getElementById(elmnt).src='/_img/menu/'+elmnt+state+'.gif';
}

function sub(elmnt,state){
	document.getElementById(elmnt).style.display=state;
}