// -----------------------------------------------------------------------------
// OBECNE FUNKCE

function enableID(iid) 
{
    var element = document.getElementById(iid);
    element.disabled = false; 
}

function disableID(iid) 
{
    var element = document.getElementById(iid);
    element.disabled = true; 
}

function onlyNumbers(evt)
{
    var charCode = (evt.which) ? evt.which : event.keyCode;
    if (charCode > 31 && (charCode < 48 || charCode > 57))
	return false;

    return true;
}

function setFocusId(iid) 
{
    document.getElementById(iid).focus();
}