function start() {
	if (document.getElementById('obsah').offsetHeight<380) {
		document.getElementById('sipka').style.visibility='hidden';
		document.getElementById('sipka2').style.visibility='hidden';
    
	};
}

function movedown(x) {
//	alert(x);
	if (x<0) return false;
	pos='-'+30*x+'px';
//	pos=x+'px';
	document.getElementById('obsah').style.top=pos;
	return false;
}

function zavrit() {
	document.getElementById("Reklama").style.display = 'none'; 
	document.getElementById("ModalBG").style.display = 'none'; 
	return false;
}

//var rootElm = (d.documentelement && d.compatMode == 'CSS1Compat') ? d.documentelement : d.body; 
//var vpw = self.innerWidth ? self.innerWidth : rootElm.clientWidth; // viewport width 
//var vph = self.innerHeight ? self.innerHeight : rootElm.clientHeight; // viewport height 
//var myDiv = d.getelementById('Reklama'); 
//myDiv.style.left = ((vpw - 100) / 2) + 'px';  
//myDiv.style.top = (rootElm.scrollTop + (vph - 100)/2 ) + 'px'; 

function rstart() {
	var d = document; 
	var rootElm = (d.documentelement && d.compatMode == 'CSS1Compat') ? d.documentelement : d.body; 
	var vpw = self.innerWidth ? self.innerWidth : rootElm.clientWidth; // viewport width 
	var vph = self.innerHeight ? self.innerHeight : rootElm.clientHeight; // viewport height 
	document.getElementById("Reklama").style.position = 'absolute'; 
	document.getElementById("Reklama").style.left = ((vpw - 825) / 2) + 'px';  
	document.getElementById("Reklama").style.top = '60px';
	//((vph - 500)/2 ) + 'px'; 
//    alert("X");
}