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1: <noscript>
2: Hello to the non-JavaScript browser.
3: </noscript> 
4 Á´½ÓÍⲿ½Å±¾Îļþ
1: <script language=”JavaScript” src="/”filename.js"”></script> 
5 ×¢Êͽű¾
1: // This is a comment
2: document.write(“Hello”); // This is a comment
3: /*
4: All of this
5: is a comment
6: */ 
6 Êä³öµ½ä¯ÀÀÆ÷
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1: <script language=”JavaScript”>
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1: <script language=”JavaScript”>
2: <!--
3: document.write(“Hello”);
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2: Hello to the non-JavaScript browser.
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1: <script language=”JavaScript” src="/”filename.js"”></script> 
5 ×¢Êͽű¾
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2: document.write(“Hello”); // This is a comment
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½â¾öFirefox ÏÂF5ºÍIEÏÂF5 ²»Ò»ÖµÄjavascript ½Å±¾.

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 {
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   if(e.preventDefault)
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