IE8中js设置textarea值出错


<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>Chapter 7: Example 4</title>
<script type="text/javascript">
function DisplayEvent(eventName)
{
var myMessage = document.form1.textarea2.text;
myMessage += eventName;
document.form1.textarea2.text = myMessage;
}
</script>
</head>

<body>
<form action="" name="form1">
<textarea rows="15" cols="40" name="textarea1"
onchange="DisplayEvent('onchange\n');"
onkeydown="DisplayEvent('onkeydown\n');"
onkeypress="DisplayEvent('onkeypress\n');"
onkeyup="DisplayEvent('onkeyup\n\n');"
</textarea>
<textarea rows="15" cols="40" name="textarea2"></textarea>
<br />
<br />
<input type="button" value="Clear Event TextArea" name="button1" onclick="document.form1.textarea2.text=''" />
</form>
</body>
</html>好好的代码在Firefox里面正常运行，为什么在IE8中就不对呢

解决方案 »

  1.   

    首先是你的textarea1没闭合，再是.value而不是.text<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml">
        <head>
            <meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
            <title>Chapter 7: Example 4</title>
            <script type="text/javascript">
                function DisplayEvent(eventName)
                {
                    document.form1.textarea2.value  += eventName;
                }
            </script>
        </head>
        
        <body>
            <form action="" name="form1">
                <textarea rows="15" cols="40" name="textarea1"
                    onchange="DisplayEvent('onchange\n');"
                    onkeydown="DisplayEvent('onkeydown\n');"
                    onkeypress="DisplayEvent('onkeypress\n');"
                    onkeyup="DisplayEvent('onkeyup\n\n');">
                </textarea>
                <textarea rows="15" cols="40" name="textarea2"></textarea>
                <br />
                <br />
                <input type="button" value="Clear Event TextArea" name="button1" onclick="document.form1.textarea2.value=''" />
            </form>
        </body>
    </html>
      

  2.   

    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml">
        <head>
            <meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
            <title>Chapter 7: Example 4</title>
            <script type="text/javascript">
                function DisplayEvent(eventName)
                {
                    var myMessage = document.form1.textarea2.value;
                    myMessage += eventName+'\n';
                    document.form1.textarea2.value = myMessage;
                }
            </script>
        </head>
        
        <body>
            <form action="" name="form1">
                <textarea rows="15" cols="40" name="textarea1"
                    onchange="DisplayEvent('onchange');"
                    onkeydown="DisplayEvent('onkeydown');"
                    onkeypress="DisplayEvent('onkeypress');"
                    onkeyup="DisplayEvent('onkeyup');">
                </textarea>
                <textarea rows="15" cols="40" name="textarea2"></textarea>
                <input type="button" value="Clear Event TextArea" name="button1" onclick="document.form1.textarea2.value=''" />
            </form>
        </body>
    </html>