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1 <script> |
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2 var showedAlert = false; |
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3 function handleUnload() |
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4 { |
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5 if (showedAlert) |
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6 return; |
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7 |
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8 showedAlert = true; |
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9 alert("Now Quit Safari. Do not dismiss this alert first."); |
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10 } |
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11 </script> |
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12 <body onunload="handleUnload()"> |
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13 Close this window |
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14 </body> |