.net,js捕捉文本框回车键事件的小例子(兼容多浏览器)

function bubufx_enterpress(e) {
        var keynum;

 
        if (window.event) // IE  
        {
            keynum = e.keyCode;

        }
        else if (e.which) // Netscape/Firefox/Opera  
        {
            keynum = e.which;
        }
        if (keynum == 13) {

            soJS();//回车事件处理脚本
            return false;
        }

    }

<asp:TextBox ID="TextBox1" runat="server" CssClass="tb" Style="font-size: 18px; width: 300px;
                        height: 25px;"   onkeydown="return bubufx_enterpress(event);" ></asp:TextBox>