<!DOCTYPE HTML> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>if...else</title> <script type="text/JavaScript"> var score =80; //score變量存儲(chǔ)成績(jī)，初值為80 if(score > 160){ document.write("很棒，成績(jī)及格了。"); } else if(score = 80){ document.write("l
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