k4st

var text_history = [];var index = -1;$("#input_id").bind("keyup",function(e){	if(e.keyCode == 38 || e.keyCode == 40) {		if(e.keyCode == 38) {			index++;		} else {			index--;		}		ret = "";		if(typeof text_history[index] != "undefined") {			ret = text_history[index];		}		$(this).val(ret);	}});