// JavaScript Document
var nav4 = window.Event ? true : false;
function acceptNum(evt){
	// NOTE: Backspace = 8, Enter = 13, '0' = 48, '9' = 57, 45 = - , . = 46
	var args = acceptNum.arguments;
	var key = nav4 ? args[0].which : args[0].keyCode;
	
	if(args[1] == 0) {
		return (key <= 13 || (key >= 48 && key <= 57));
	} else {
		return (key);
	}
}