点击运行可以看到效果: <HTML> <HEAD> <META http-equiv='Content-Type' content='text/html; charset=gb2312'> <TITLE>文本框栏目介绍</TITLE> <SCRIPT LANGUAGE="JavaScript"> <!-- Begin var messages = new Array(6); messages[0] = ""; messages[1] = "Have you ever seen anything like this before?"; messages[2] = "Can you imagine how you could use it on your site?"; messages[3] = "It's great for sharing lots of information."; messages[4] = "And doesn't take up much space! "; messages[5] = "So, get the code and put it on your site!"; function messageReveal() { var messageindex = document.messageForm.messagePick.selectedIndex document.messageForm.messageField.value = messages[messageindex]; } // End --> </SCRIPT> </HEAD> <BODY > <form name="messageForm"> <select name="messagePick" OnChange="messageReveal()"> <option value="0">The Menu Message <option>Seen this before? <option>Possible uses? <option>Shares Information <option>Saves space <option>Get the code! </select> <textarea name="messageField" rows=6 cols=50 wrap=virtual></textarea> </form> </BODY></HTML> [Ctrl+A 全选 提示:你可先修改部分代码,再按运行]
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