javascript怎么修改textarea内容 _JavaScript

javascript如何修改textarea内容

HTML code


<?xml version="1.0" encoding="UTF-8" ?>
<!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=UTF-8" />
        <title>Insert title here</title>
        <script type="text/javascript">
            document.getElementById("text").value = "Hello";
        </script>
    </head>
    
    <body>
        <textarea rows="10" cols="80" id="text"></textarea>
    </body>
</html>

但是这样写压根没有修改textarea的内容，求教高手应该怎么改

------解决方案--------------------

HTML code


<textarea rows="10" cols="80" id="text"></textarea>
<script type="text/javascript">
    document.getElementById("text").value = "Hello";
</script>

------解决方案--------------------
需要等dom加载完了 再操作
HTML code
<!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=UTF-8" />
        <title>Insert title here</title>

    </head>
    
    <body>
        <textarea rows="10" cols="80" id="text"></textarea>
        <script type="text/javascript">
            document.getElementById("text").value = "Hello";
        </script>        
    </body>
</html>