/**
	some useful methods
	
	@author Marek Skopowski <m.skopowski@pixelate.pl>
	@version 1.0
*/
String.prototype.trim = function()
{
	return this.replace(/^\s+|\s+$/g,"");
}
String.prototype.ltrim = function()
{
	return this.replace(/^\s+/,"");
}
String.prototype.rtrim = function()
{
	return this.replace(/\s+$/,"");
}