function keyCode_allowPositiveInt(){
		if( !validateByRule(String.fromCharCode(window.event.keyCode), "[0-9]") )
			window.event.returnValue = false;			
	}
		
	function keyCode_allowPositiveFloat(){
		if( !validateByRule(String.fromCharCode(window.event.keyCode), "[\.]|[0-9]") )
			window.event.returnValue = false;
	}
	
	function keyCode_allowInt(){
		if( !validateByRule(String.fromCharCode(window.event.keyCode), "[\-]|[0-9]") )
			window.event.returnValue = false;
	}
	
	function keyCode_allowFloat(){
		if( !validateByRule(String.fromCharCode(window.event.keyCode), "[\.]|[\-]|[0-9]") )
			window.event.returnValue = false;
	}
	
	function keyCode_allowChar(){
		if( !validateByRule(String.fromCharCode(window.event.keyCode), "[a-zA-Z]") )
			window.event.returnValue = false;
	}
	
	function keyCode_enter2Tab(){
		if( event.keyCode == 13 )
			event.keyCode = 9;
	}