第2个回答 推荐于2016-08-20
对
测试如下:
<html>
<head>
<script language = "javascript">
function test() {
var pattern = /^([0-9.]+)$/;
var str = prompt("Enter the test string","");
if (pattern.test(str)) {
alert(true);
} else {
alert(false);
}
}
</script>
</head>
<body>
<input type = "button" value = "test" onclick = "test()" />
</body>
</html>本回答被提问者采纳