confirm("")返回的是一个boolean型的,不是true就是false
<html><head>
<script type="text/javascript">
function show_confirm(){
var r=confirm("Press a button!");
if (r==true)
{
alert("You pressed OK!");
}
else
{
alert("You pressed Cancel!");
}
}
</script>
</head>
<body><input type="button" onclick="show_confirm()" value="Show a confirm box" />
</body>
</html>
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