function RTrim(str) {
	var i, j, letter;
	j = -1;
	for (i=str.length-1;i>=0;--i) {
		letter = str.charAt(i);
		if (letter != ' ') {
			j = i;
			break;
		}
	}
	if (j != -1) return str.substring(0,j+1);
	else return '';
}
	
function LTrim(str) {
	var i, j, letter;
	j = -1;
	for (i=0;i<str.length;++i) {
		letter = str.charAt(i);
		if (letter != ' ') {
			j = i;
			break;
		}
	}
	if (j != -1) return str.substring(j,str.length);
	else return '';
}
	
function Trim(str) {
	return RTrim(LTrim(str));
}