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<title>plc学堂</title>
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javascript" src="mytest/jQuery/jquery-1.8.3.js"></script>
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文本框：<input type="text" name="zhuanqu" disabled="disabled" />
可用的文本框：<input type="text" name="keyong" />
<input type="submit" value="提交" />
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<button>点击查看效果</button>
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