var TypeUtils = new Object();

TypeUtils.isInteger = function (s){
	var i;
    for (i = 0; i < s.length; i++){
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    // All characters are numbers.
    return true;
}


    // Search through string's characters one by one.
    // If character is not in bag, append to returnString.
TypeUtils.stripCharsInBag = function (s, bag){
	var i;
    var returnString = "";
    for (i = 0; i < s.length; i++){
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}