在一个文本框里只能输入数字，不能输入别的字母？请教高手！

[915world]

在线等，急！！

[litao3029]

<script language="javascript">
<!--
//限制年月日的输入必须是数字
if (document.layers)
document.captureEvents(event.KeyPress);

function blockA(e)
{
if (document.layers)
{
var keyChar =e.which;
}
if (document.all)
{
var keyChar =event.keyCode;
}
if (keyChar>57 || keyChar<46 || keyChar==47 )
{
alert('请输入数字！');
return false;
}

}

document.form1.text1.onkeypress = blockA;
//-->
</script>

[915world]

好了，问题解决了，马上发分！

[cngis]

Sub txt1_onkeyUP
if window.event.keyCode>=48 and window.event.keyCode<=105 then
if window.event.keyCode<=57 or window.event.keyCode=>96 then
......
else
form1.txt1.value=""
end if
else
if window.event.keyCode=13 then

else
form1.txt1.value=""
end if
end if
End Sub

[rexsp]

<input onkeyup="this.value=this.value.replace(/\D/g,'')" onafterpaste="this.value=this.value.replace(/\D/g,'')">
---------------------------------------------------------------

<input name=txt1 onchange="if(/\D/.test(this.value)){alert('只能输入数字');this.value='';}">
---------------------------------------------------------------

<input onkeyup="if(isNaN(value))execCommand('undo')" onafterpaste="if(isNaN(value))execCommand('undo')">