php - 为什么我的 textarea 文本没有按预期显示/隐藏？

Question

我正在尝试在我的文本区域中使用 javascript 来显示文本，直到用户单击它。文本应在加载时显示并在单击时消失。然而，我的似乎恰恰相反。在用户单击该框并再次单击它之前，我的文本不会在加载时显示？不太确定我做错了什么。

<form action="upload.php" method="POST">

<input type="hidden" name="hidden_id" value="<?php print $id; ?>"/>
<input type="text" id="username" name="sent_by" onfocus="if (this.value == 'Your Name')
this.value = '';" onblur="if (this.value == '') this.value = 'Your Name';" maxlength="30"  
value="Your Name" />

<input type="text" id="user_email" name="sent_email" onfocus="if (this.value == 'Your Email')   
this.value = '';" onblur="if (this.value == '') this.value = 'Your Email';" maxlength="30" 
value="Your Email" />
<br /><br />

<textarea name="message" value="Enter Your Message Here..." cols="60" rows="5" 
id="artical_message" onfocus="if (this.value == 'Enter Your Message Here...') this.value = '';" 
onblur="if (this.value == '') this.value = 'Enter Your Message Here...';" ></textarea>

<p align="right">
<input name="submit_comment" type="submit" value="Send Message" class="contact_button">
</p>
</form>

Answer 1

textarea标签没有值属性。试试这个:http://jsfiddle.net/kudTF/

将内容放在 <textarea> 中标签。

<form action="upload.php" method="POST">

<input type="hidden" name="hidden_id" value="<?php print $id; ?>"/>
<input type="text" id="username" name="sent_by" onfocus="if (this.value == 'Your Name')
this.value = '';" onblur="if (this.value == '') this.value = 'Your Name';" maxlength="30"  
value="Your Name" />

<input type="text" id="user_email" name="sent_email" onfocus="if (this.value == 'Your Email')   
this.value = '';" onblur="if (this.value == '') this.value = 'Your Email';" maxlength="30" 
value="Your Email" />
<br /><br />

<textarea name="message" value="Enter Your Message Here..." cols="60" rows="5" 
id="artical_message" onfocus="if (this.value == 'Enter Your Message Here...') this.value = '';" 
onblur="if (this.value == '') this.value = 'Enter Your Message Here...';" >Enter Your Message Here...</textarea>

<p align="right">
<input name="submit_comment" type="submit" value="Send Message" class="contact_button">
</p>
</form>