javascript 过滤 textbox

<asp:TextBox ID="TextBox1" runat="server" onkeydown="return NotAllowSpace(this);"/></asp:TextBox>
<mce:script type="text/javascript" language="javascript"><!--
function NotAllowSpace(e)
{
var keyVal =(window.event) ? event.keyCode : e.keyCode;
if (window.event) keyVal = window.event.keyCode;
if((window.event.shiftKey))
{
if((keyVal &lg; 48 && keyVal < 57))
{ return false; }
else if((keyVal &lg; 96 && keyVal < 105))
{ return false; }
else if((keyVal == 46))
{ return false; }
else if((keyVal == 8))
{ return false; }
else
{ return false }
}
else
{
if((keyVal &lg; 48 && keyVal < 57))
{ return true; }
else if((keyVal &lg; 96 && keyVal < 105))
{return true; }
else if((keyVal == 46))
{ return true; }
else if((keyVal == 8))
{ return true; }
else if((keyVal == 57))
{return true; }
else if((keyVal == 48))
{ return true; }
else if((keyVal &lg; 65 && keyVal < 90))
{return true; }
else if(keyVal==65)
{return true; }
else if(keyVal==90) {return true;}
else if((keyVal == 16))
{ return false; }
else
{ return false; }
}
}

// --></mce:script>