点击button调用ｊｓ弹出windows窗口，就像邮箱中点击附件上传弹出一个windows选项窗口。 用ｊｓ该如何实现。
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open Method Internet Development Index
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Opens a new window and loads the document specified by a given URL.
What's New for Microsoft® Internet Explorer 6
As of Internet Explorer 6, the _media value of the sName parameter specifies that this method loads a URL into the HTML content area of the Media Bar.
Syntax
oNewWindow = window.open( [sURL] [, sName] [, sFeatures] [, bReplace])
Parameters
sURL Optional. String that specifies the URL of the document to display. If no URL is specified, a new window with about:blank is displayed.
sName Optional. String that specifies the name of the window. This name is used as the value for the TARGET attribute on a form or an a element._blank The sURL is loaded into a new, unnamed window.
_media The sURL is loaded into the HTML content area of the Media Bar. Available in Internet Explorer 6 or later.
_parent The sURL is loaded into the current frame's parent. If the frame has no parent, this value acts as the value _self.
_search Available in Internet Explorer 5 and later. The sURL is opened in the browser's search pane.
_self The current document is replaced with the specified sURL .
_top sURL replaces any framesets that may be loaded. If there are no framesets defined, this value acts as the value _self.
sFeatures Optional. This String parameter is a list of items separated by commas. Each item consists of an option and a value, separated by an equals sign (for example, "fullscreen=yes, toolbar=yes"). The following features are supported.channelmode = { yes | no | 1 | 0 } Specifies whether to display the window in theater mode and show the channel band. The default is no.
directories = { yes | no | 1 | 0 } Specifies whether to add directory buttons. The default is yes.
fullscreen = { yes | no | 1 | 0 } Specifies whether to display the browser in full-screen mode. The default is no. Use full-screen mode carefully. Because this mode hides the browser's title bar and menus, you should always provide a button or other visual clue to help the user close the window. ALT+F4 closes the new window. A window in full-screen mode must also be in theater mode (channelmode).
height = number Specifies the height of the window, in pixels. The minimum value is 100.
left = number Specifies the left position, in pixels. This value is relative to the upper-left corner of the screen. The value must be greater than or equal to 0.
location = { yes | no | 1 | 0 } Specifies whether to display the input field for entering URLs directly into the browser. The default is yes.
menubar = { yes | no | 1 | 0 } Specifies whether to display the menu bar. The default is yes.
resizable = { yes | no | 1 | 0 } Specifies whether to display resize handles at the corners of the window. The default is yes.
scrollbars = { yes | no | 1 | 0 } Specifies whether to display horizontal and vertical scroll bars. The default is yes.
status = { yes | no | 1 | 0 } Specifies whether to add a status bar at the bottom of the window. The default is yes.
titlebar = { yes | no | 1 | 0 } Specifies whether to display a title bar for the window. This parameter is ignored unless the calling application is an HTML Application or a trusted dialog box. The default is yes.
toolbar = { yes | no | 1 | 0 } Specifies whether to display the browser toolbar, making buttons such as Back, Forward, and Stop available. The default is yes.
top = number Specifies the top position, in pixels. This value is relative to the upper-left corner of the screen. The value must be greater than or equal to 0.