判断只能输入正数

//只能录入整数function InputNumber(e) {    if ($.browser.msie) {  // 判断浏览器        //if (((event.keyCode > 47) && (event.keyCode < 58)) || (event.keyCode == 8)) {// 判断键值          if (((event.keyCode > 47) && (event.keyCode < 58)) || ((event.keyCode > 95) && (event.keyCode < 106)) || (event.keyCode == 8) || (event.keyCode == 46) || (event.keyCode == 37) || (event.keyCode == 39)) {             return true;        } else {            return false;        }    } else {        //if (((e.which > 47) && (e.which < 58)) || (e.which == 8) || (event.keyCode == 17)) {        if (((e.which > 47) && (e.which < 58)) || ((e.which > 95) && (e.which < 106)) || (e.which == 8) || (e.which == 46) || (e.which == 37) || (e.which == 39)) {             return true;        } else {            return false;        }    }}