var CommonJS = {
	isMatch: function(str, match_string) {
		var have_match = true;
		var ch;

		for (i = 0; i < str.length && have_match == true; i++) 
		{ 
			ch = str.charAt(i); 
			if (match_string.indexOf(ch) == -1) { have_match = false; }
		}
		
		return have_match;
	},
	
	isNumeric: function(str, include_point) {
		var validChars;
		var isNumber = true;
		var ch;

		if(include_point)
			validChars = "0123456789.";
		else	
			validChars = "0123456789";

		for (i = 0; i < str.length && isNumber == true; i++) 
		{ 
			ch = str.charAt(i); 
			if (validChars.indexOf(ch) == -1) { isNumber = false; }
		}
		
		return isNumber;
	}
};