日期:2014-05-19 浏览次数:20897 次
<html>
<head>
<title>XXXXXX</title>
<script language="javascript">
var count = 0;
function test() {
if (count == 0) {
alert("only once");
}
count++;
}
</script>
</head>
<body>
<input type="button" value="test" onclick="test();" />
</body>
</html>