function changeClass(oElement, sClassName) {
  oElement.className = sClassName;
} // end...function

function gotoPage(sLocation) {
  //window.top.location.assign(sLocation);
	window.location.assign(sLocation);
} // end...function

function isNumberInText(number)  //  boolean function
{
 	var inpstr = "" + number;
  for(var i = 0; i < inpstr.length; i++) {
    var chr = inpstr.charAt(i);
    if( chr < "0" || chr > "9" )
      return false;
  }
  return true;
}

function checkButtons(pageNo, pageNum) {
	pageNum = FPageCount;
  pageNo  = FPageNumber;
  var btnNaprej = document.getElementById('bNaprej');
  var btnNazaj = document.getElementById('bNazaj');	
  var btnNaprejLower = document.getElementById('bNaprejLower');
  var btnNazajLower = document.getElementById('bNazajLower');			
  btnNazaj.disabled = false;
	btnNazaj.className = 'button';
	btnNaprej.disabled = false;
	btnNaprej.className = 'button';		
				
  if(pageNo <= 1) { 			
		btnNazaj.className = 'button-disabled';			
	  btnNazaj.disabled = true;		 
	}
  if(pageNo >= pageNum) { 
		btnNaprej.className = 'button-disabled';			
	  btnNaprej.disabled = true; 
	}			
	
	if (btnNazajLower != null){
		btnNazajLower.className = btnNazaj.className;			
	  btnNazajLower.disabled = btnNazaj.disabled;
	}
	if (btnNaprejLower != null){	
		btnNaprejLower.className = btnNaprej.className;			
	  btnNaprejLower.disabled = btnNaprej.disabled;
	}				 	
}

function openWindowCentered(sUrl, sHeight, sWidth) {
  nleft = (screen.width / 2) - (sWidth / 2);
	ntop  = (screen.height / 2) - (sHeight / 2);
	
//	alert("top = " + ntop + " left = " + nleft); 
	
  sparams = "height=" + sHeight + ",width=" + sWidth + ",left=" + nleft + ",top=" + ntop;
	sparams = sparams + ",resizable=yes";
//	alert(sparams);
  window.open(sUrl, '_blank', sparams);
 
	return true; 
}