JavaScript 限制文本框只能输入数字

?<input name="go" id="go" type="text" value="" onblur="checksz('go')" size="3" ?onkeypress="return event.keyCode>=48&&event.keyCode<=57||event.keyCode==46"

?? ? onpaste="return !clipboardData.getData('text').match(/\D/)" ondragenter="return false" />