/* Retorna uma string trim */
function trim(myString)
{
	if (myString.length > 0)
	{
		while (myString.charAt(0) == ' ')
			myString = myString.substr(1,myString.length-1);
		
		while (myString.charAt(myString.length-1) == ' ')
		myString = myString.substr(0,myString.length-1);	
	}
	return myString;
}