js IE6 IE7 兼容问题

Question

   function myKeyDown()
        {
        var k=window.event.keyCode;   
        alert(k);        if ((k==46)||(k==8)||(k==189)||(k==109)||(k==190)||(k==110)|| (k>=48 && k<=57)||(k>=96 && k<=105)||(k>=37 && k<=40)) 
        {}
        else if(k==13){
             window.event.keyCode = 9;}
        else{
             window.event.returnValue = false;}
        }
<asp:TextBox ID="TextBox1" runat="server" Style="ime-mode: disabled" onkeydown="myKeyDown()"></asp:TextBox>
在IE6下正常的

Answer 1

onkeydown="myKeyDown(event)"
var k=event.keyCode;