function trim(str, chars) {
	return ltrim(rtrim(str, chars), chars);
}
 
function ltrim(str, chars) {
	chars = chars || "\\s";
	return str.replace(new RegExp("^[" + chars + "]+", "g"), "");
}
 
function rtrim(str, chars) {
	chars = chars || "\\s";
	return str.replace(new RegExp("[" + chars + "]+$", "g"), "");
}

// return the value of the radio button that is checked
// return an empty string if none are checked, or
// there are no radio buttons
function getCheckedValueRadio(radioObj) {
  if(!radioObj)
    return "";
	var radioLength = radioObj.length;
	if(radioLength == undefined)
		if(radioObj.checked)
			return radioObj.value;
		else
			return "";
	for(var i = 0; i < radioLength; i++) {
		if(radioObj[i].checked) {
			return radioObj[i].value;
		}
	}
	return "";
}

// iniciuje 3-rd party FCKeditor (HTML WYSYWIG editor)
function fckinit() {
	var sBasePath = '/_fckeditor/' ;
	var oFCKeditor = new FCKeditor( 'FCKeditor1' ) ;
	oFCKeditor.BasePath	= sBasePath ;
	oFCKeditor.ReplaceTextarea() ;
}