function getWindowHeight() {
	if (window.innerHeight) return window.innerHeight;
	else if (document.documentElement && document.documentElement.clientHeight)
		return document.documentElement.clientHeight;
	else if (document.body && document.body.clientHeight)
		return document.body.clientHeight;
	else return null;
	}

function getElementHeight(Elem) {
	if(document.getElementById) {
		var elem = document.getElementById(Elem);
	} else if (document.all){
		var elem = document.all[Elem];
	}
    xPos = elem.style.pixelHeight;
	if(!xPos) xPos = elem.offsetHeight;
	return xPos;  
}

var realContH = 0;
function resizeMe(){ 
  var base          = 219; //+ footer      
  var contentH      = getElementHeight('content_cover');          
  var screenHeight  = getWindowHeight();  
  if(!realContH)    realContH = contentH;  
  if(screenHeight > base+realContH){
     newHeight = realContH + (screenHeight-(base+realContH));
     document.getElementById('content_cover').style.height = newHeight+'px';
    }  
}


var curr_k = "Info";

function kontakt( k ){
  if(curr_k) document.getElementById( curr_k ).style.display = 'none';
  document.getElementById( k ).style.display = 'block';
  curr_k = k;
}


function VG( id ) { 
  window.open('src/Galex.html','prohlidka','width=625,height=650')
}