function ltrim (s) 
{ 
	s = s.replace( /^\s*/, "" ) ;
	return s;
}
function rtrim (s) 
{ 
	s = s.replace( /\s*$/, "" ); 
	return s
} 
function trim (s) 
{ 
	s = rtrim(ltrim(s)); 
	return s; 
}