请问以下面的函数是什么意思啊?


function addFile()
{
var str = '<INPUT type="file" size="50" NAME="File">'
document.getElementById('MyFile').insertAdjacentHTML("beforeEnd",str)
}

不明白getElementByld和insertAdjacentHTML 这两个东西

insertAdjacentHTML :

Inserts the given HTML text into the element at the location.

Syntax

object.insertAdjacentHTML(sWhere, sText)
Parameters
sWhere Required. String that specifies where to insert the HTML text, using one of the following values:
beforeBegin Inserts sText immediately before the object.
afterBegin Inserts sText after the start of the object but before all other content in the object.
beforeEnd Inserts sText immediately before the end of the object but after all other content in the object.
afterEnd Inserts sText immediately after the end of the object.

sText Required. String that specifies the HTML text to insert. The string can be a combination of text and HTML tags. This must be well-formed, valid HTML or this method will fail.

Return Value

No return value.

[此贴子已经被作者于2006-10-12 22:06:26编辑过]