// var GLOBAL_FIELD_TO_PROCESS_EVENT  = null;

// window object from which we take the IE event for fieldchecks

var GLOBAL_FIELD_CHECK_WINDOW_EVENT= this;

var VALID_NUMBERS		 = "0123456789";



function getIEEvent() {

    return GLOBAL_FIELD_CHECK_WINDOW_EVENT.event;

}

// -------------------------------------------

// Ueberpruefen ob feldwert gueltig ist

// -------------------------------------------

function hasValidPattern(field, patterns) {

	var value = field.value;



	var i;

	for(i=0; i < patterns.length; i++) {

		if (patterns[i].test(value) == true) break;

	}

	if (i == patterns.length) return false;

	return true;

}



// -----------------------------------------------

// Browserabhaengiges ermitteln des keys vom event

// -----------------------------------------------

function getKey(keyEvent) {

	var keyCode = getKeyCode(keyEvent);



	return String.fromCharCode(keyCode);

}



// --------------------------------------------------

// Browserabhaengiges ermitteln des keycode vom event

// --------------------------------------------------

function getKeyCode(keyEvent) {

	if (isNavigator()) {

		return keyEvent.which;

	} else {

		return keyEvent.keyCode;

	}

}



function isValidSystemKey(keyEvent) {

	var keyCode = getKeyCode(keyEvent);

	// In safari the Arrow Left and Arrow Right key are called when keyPressed 

	if (keyCode == 63235 ||keyCode == 63234)

		return true;

	return (keyCode < 10);

}



function isEnterKey(keyEvent) {

	var keyCode = getKeyCode(keyEvent);

	return (keyCode == 10 || keyCode == 13);

}



function fillWithNull(value, fillLength) {

	while(value.length < fillLength) {

		value = "0" + value;

	}

	return value;

}



// --------------------------------------------------

// Ueberpruefen ob gueltiges zeichen im event

// --------------------------------------------------

function isValidKey(keyEvent, validChars) {

	var key = getKey(keyEvent);

	if (isValidSystemKey(keyEvent)) return true;

	if (validChars.indexOf(key) < 0) return false;

	return true;

}



function getEventField(anEvent) {	

	if (isNavigator()) 

		return anEvent.target;

	else

		return anEvent.srcElement;

	//return GLOBAL_FIELD_TO_PROCESS_EVENT;

}