利用js做相关check

1、输入的必须是数字

前台：    function keyInputNumCheck()
        {
         try{
             if (window.event.keyCode < 48 || (window.event.keyCode > 57 && window.event.keyCode < 94) || window.event.keyCode > 105)
                {
           if(window.event.keyCode!=46 && window.event.keyCode!=45
               && window.event.keyCode!=37 && window.event.keyCode!=39
               && window.event.keyCode!=9 && window.event.keyCode!=8
               && window.event.keyCode!=40 && window.event.keyCode!=13)
           {
            window.event.keyCode=0;
            return false;
           }
           
                }
            }catch(e) { alert(e.description); }
        }

 

后台pageload中txtCardNumber.Attributes.Add("onkeydown", "return keyInputNumCheck();");