控制只能输入数字的脚本?

Question

//正则检测是否为数字
function isNumeric(Num)
{
var re=/^\d+$/g;
return re.test(Num);
}

Answer 1

<input onkeypress="return /\./.test(this.value)?(event.keyCode>=48&&event.keyCode<=57):((event.keyCode>=48&&event.keyCode<=57)||(event.keyCode==46))"
 onpaste="return /\./.test(this.value)?!/\D/.test(clipboardData.getData('text')):(!/[^\d\.]/.test(clipboardData.getData('text')))"
 ondragenter="return false" style="ime-mode:disabled">

Answer 2

<input onkeypress="return /\./.test(this.value)?(event.keyCode>=48&&event.keyCode<=57):((event.keyCode>=48&&event.keyCode<=57)||(event.keyCode==46))"
 onpaste="return /\./.test(this.value)?!/\D/.test(clipboardData.getData('text')):(!/[^\d\.]/.test(clipboardData.getData('text')))"
 ondragenter="return false" style="ime-mode:disabled">