for in 用法,该怎么解决

2012-03-16

for in 用法for in用法例如：我要查document对像下的属性可以用如下语句var propfor(prop in document){do

for in 用法
for in用法
例如：我要查document对像下的属性可以用如下语句
var prop;
for(prop in document)
{
document.write(prop+":"+document[prop]+"<br />");
}

现我想得到document下面的属性的属性，怎么办
var prop;
for(prop in document.form)
{
document.write(prop+":"+document.form[prop]+"<br />");
}
这个是错的，请朋友们帮我给出正确的答案吧，

[解决办法]

HTML code

<script type="text/javascript">var prop; for(prop in document.forms[0]) {    document.write(prop+":"+document.forms[0][prop]+" <br/>"); } </script>
[解决办法]
1楼滴没问题，L@_@K
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> 
    <title>js.showAllPropertiesOfForm.html </title> 
    <meta name="generator" content="editplus" /> 
    <meta name="author" content="Gao YiXiang" /> 
    <meta name="email" content="yixianggao@126.com" /> 
    <meta name="keywords" content="javascript dhtml dom" /> 
    <meta name="description" content="I love web development." /> 
  </head> 
  <body> 
    <form> </form> 
    <script type="text/javascript"> 
    <!-- 
 for(var prop in document.forms[0]) 
 { 
  document.write(prop + " : " + document.forms[0][prop] + " <br />"); 
 } 
   //--> 
    </script> 
  </body> 
  </html>

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for in 用法,该怎么解决