限制输入A-Z a-z 0-9

Script方法：   

 function fnNumericOnKeyPress()

        {

                var exp =  String.fromCharCode(window.event.keyCode)

                var r = new RegExp("^[A-Za-z0-9]+$", "g");

                        if (exp.match(r) == null)

                        window.event.keyCode = 0

        }

 

Text：

<asp:TextBox ID ="BrkrCode" CssClass="InputBox" runat="server" onkeypress="fnNumericOnKeyPress()" MaxLength="6"></asp:TextBox>