<!DOCTYPE HTML><html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>if...else</title><script type="text/JavaScript">var ticket =true; //ticket初值为true，表示有票if(ticket=="true") {document.write("有票，可以看电影。");}else {document.write("没票，电影看不成。");}</script></head><body></body></html>
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