if (document.all) document.getElementById = document.all;
var dhtml = (document.getElementById || document.all) && navigator.userAgent.indexOf('Opera') == -1 ? true : false;  

function getE(objectID) {
  return document.getElementById(objectID);
}

function emailControl(f) {
  if ((f=='' || f=='Váš email..') ||(f.indexOf('@') < 1 || f.indexOf('@') != f.lastIndexOf('@') || f.lastIndexOf('.') < f.lastIndexOf('@')+2  || f.lastIndexOf('.') > (f.length-3) || f.lastIndexOf('.') < (f.length-4)) || f.indexOf(" ") >= 0  ||  f.indexOf("#") >= 0  || f.indexOf("/") >=0 || f.indexOf(":") >=0 || f.indexOf(";") >=0 || f.indexOf("(") >=0 || f.indexOf(")") >=0 || f.indexOf("[") >=0 || f.indexOf("]") >=0 || f.indexOf("'") >=0)	{
	return false;
  }
  return true;
}

function numbersonly(myfield, e, dec) {
var key;
var keychar;

if (window.event)
key = window.event.keyCode;
else if (e)
key = e.which;
else
return true;
keychar = String.fromCharCode(key);

if ((key==null) || (key==0) || (key==8) ||
(key==9) || (key==13) || (key==27) )
return true;
else if ((("0123456789").indexOf(keychar) > -1))
return true;
else if (dec && (keychar == "."))
{
myfield.form.elements[dec].focus();
return false;
}
else
return false;
}

function showFirm(objChb, whatKind) {
  if (getE(objChb).checked)	{
    getE(whatKind).style.display = "block";
  } else {
    getE(whatKind).style.display = "none";
  }
}

function showAdr(objChb, whatKind) {
  if (getE(objChb).checked)	{
    getE(whatKind).style.display = "none";
  } else {
    getE(whatKind).style.display = "block";
  }
}