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2 location.reload()
3 location=location
4 location.assign(location)
5 document.execCommand('Refresh')
6 window.navigate(location)
7 location.replace(location)
8 document.URL=location.href
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2. <body onselectstart="return false"> È¡Ïûѡȡ¡¢·ÀÖ¹¸´ÖÆ
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ie firefox javascript

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var tt = 'aa';
function test(){
    alert(tt);
    var tt = 'dd';
    alert(tt);
}
test();
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var tt = 'aa';
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