function showCal(){
    document.getElementById('calendar').style.display = 'block';
}

function clearBlock(id){
    var blockElement = document.getElementById(id);
    if(blockElement && blockElement.childNodes[0]){
	blockElement.removeChild(blockElement.childNodes[0]);
    }
}

function moveToAnchor(anchor){
    anchor = '#' + anchor; 
    window.location.hash = anchor;
}