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javascript eval()应用实例 select

<html xmlns="http://www.w3.org/1999/xhtml"> 
<head> 
<title>eval()</title> 
<img src="/_New/_cj/myeditor/sysimage/space.gif" class="ewebeditor__script" _ewebeditor_fake_tag="script" _ewebeditor_fake_value="%3Cscript%20type%3D%22text%2Fjavascript%22%3E%3C!--%20%0D%0Avar%20object%3Dnew%20Object()%3B%2F%2F%E5%85%A8%E5%B1%80%E5%8F%98%E9%87%8F%2C%E7%94%A8%E6%9D%A5%E8%AE%B0%E5%BD%95checkbox%E7%9A%84%E9%80%89%E6%8B%A9%E6%83%85%E5%86%B5%20%0D%0Afunction%20on_click(obj)%20%0D%0A%7B%20%0D%0Aif(obj.checked)%20%0D%0A%7B%20%0D%0A%2F%2F%E5%A6%82%E6%9E%9C%E5%86%85%E9%80%89%E6%8B%A9%E7%9A%84%E8%AF%9D%2C%E5%B0%B1%E7%BB%99object%E5%B1%9E%E6%80%A7%E8%B5%8B%E5%80%BC%2C%E5%BD%93%E7%AC%AC%E4%B8%80%E4%B8%AA%E8%A2%AB%E9%80%89%E4%B8%AD%E7%9A%84%E6%97%B6%E5%80%99%2C%E5%80%BC%E6%98%AFobject.pro1%3D1%3B%20%0D%0A%2F%2F%E7%86%9F%E6%82%89%E5%8A%A8%E6%80%81sql%E7%9A%84%E6%9C%8B%E5%8F%8B%E5%BA%94%E8%AF%A5%E7%9F%A5%E9%81%93exec()%E7%9A%84%E7%94%A8%E6%B3%95%E8%BF%94%E5%9B%9E()%E9%87%8C%E9%9D%A2%E6%89%A7%E8%A1%8C%E7%9A%84%E7%BB%93%E6%9E%9C%20%0D%0A%2F%2F%E5%85%B6%E5%AE%9EJS%E4%B8%AD%E7%9A%84eval%E4%B9%9F%E6%98%AF%E8%BF%99%E4%B8%AA%E6%84%8F%E6%80%9D%20%0D%0Aeval(%22object.pro%22%2Bobj.value%2B%22%3D'%22%2Bobj.value%2B%22'%3B%22)%3B%20%0D%0A%2F%2F%E4%BD%A0%E5%8F%AF%E4%BB%A5alert()%E4%B8%8B%E7%9C%8B%E4%B8%8B%E9%87%8C%E9%9D%A2%E7%9A%84%E5%80%BC%3B%20%0D%0A%2F%2F%20alert(eval(%22object.pro%22%2Bobj.value%2B%22%3D'%22%2Bobj.value%2B%22'%3B%22))%3B%20%0D%0A%0D%0A%7D%20%0D%0Aelse%20%0D%0A%7B%20%0D%0Aeval(%22object.pro%22%2Bobj.value%2B%22%3D''%3B%22)%3B%20%0D%0A%7D%20%0D%0Avar%20str%3D%22%22%3B%20%0D%0A%2F%2F%E7%84%B6%E5%90%8E%E9%81%8D%E5%8E%86object%E5%AF%B9%E8%B1%A1%EF%BC%8C%E5%A6%82%E6%9E%9C%E9%87%8C%E9%9D%A2%E6%9C%89%E5%80%BC%E7%9A%84%E8%AF%9D%E5%B0%B1%E8%B5%8B%E7%BB%99str%E8%BF%99%E4%B8%AA%E5%8F%98%E9%87%8F%20%0D%0Afor(var%20i%20in%20object)%20%0D%0A%7B%20%0D%0Aif(object%5Bi%5D%3D%3D%22%22)%20%0D%0Acontinue%3B%20%0D%0Aif(str!%3D%22%22)%20%0D%0A%7B%20%0D%0Astr%2B%3D%22%2C%22%3B%20%0D%0A%7D%20%0D%0Astr%2B%3Dobject%5Bi%5D%3B%20%0D%0A%7D%20%0D%0Avar%20%24%3Dfunction(id)%20%0D%0A%7B%20%0D%0Areturn%20document.getElementById(id)%3B%20%0D%0A%7D%20%0D%0A%24('txt1').value%3Dstr%3B%20%0D%0A%7D%20%0D%0A%2F%2F%20--%3E%3C%2Fscript%3E"> 
</head>

<body> 
<input type=checkbox value=1 onclick="on_click(this)">
 
<input type=checkbox value=2 onclick="on_click(this)">
 
<input type=checkbox value=3 onclick="on_click(this)">
 
<input type=checkbox value=4 onclick="on_click(this)">
 
<input type=text id=txt1 value=""> 
</body> 
</html>

　　 [Ctrl+A 全选注:如需引入外部Js需刷新才能执行]

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