function pageHeight() {
	if (window.innerHeight != null ) {
		if (document.body.parentNode.offsetHeight <100 ) { 
			var divh = document.documentElement.clientHeight+500 ;//opera
		} else {
			var divh = document.body.parentNode.offsetHeight; //firefox
		}
	} else {
		var divh = document.getElementById('main').offsetHeight; //IE7
	}
    return divh;
}

// Open the lightbox
function openbox()
{
	var form_box = document.getElementById('form_box'); 
	document.getElementById('form_filter').style.display='block';

	/*var btitle = document.getElementById('form_boxtitle');
	btitle.innerHTML = formtitle;*/
  
  //alert(pageHeight());
  
	document.getElementById('form_filter').style.height = pageHeight() + 'px';
    form_box.style.display='block';
	window.location.href = "#uvod";
}

// Close the lightbox
function closebox()
{
	if (document.getElementById('form_box')) {
		document.getElementById('form_box').style.display='none';
	}
	document.getElementById('send_form_box').style.display='none';
	document.getElementById('form_filter').style.display='none';
}

function opensendbox(formtitle)
{
	var send_form_box = document.getElementById('send_form_box'); 
	document.getElementById('form_filter').style.display='block';
	document.getElementById('form_filter').style.height = pageHeight() + 'px';
    send_form_box.style.display='block';
}
function expandit(objectID) { 
	var theElementStyle = document.getElementById(objectID+"child"); 
	if(theElementStyle.style.display == "block") { 
		theElementStyle.style.display = "none"; 
	} else { 
		theElementStyle.style.display = "block"; 
	} 
}