if prompt is cancelled, null is returned, try<script>
var sReturn = prompt("enter","aa");
if (sReturn == null)
alert("You cancelled");
else
alert("Your entered " + sReturn);
</script>
var sReturn = prompt("enter","aa");
if (sReturn == null)
alert("You cancelled");
else
alert("Your entered " + sReturn);
</script>
解决方案 »
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