Use javascript to hide/display the specified area with the HTML element [legend]

Javascript code:
Code
Copy codeThe Code is as follows:
Function expandOther (el, el2 ){
WhichEl = document. getElementById (el)
Button = document. getElementById (el2)
If (whichEl. style. display = 'None '){
WhichEl. style. display = '';
Button. value = "hidden ";
}
Else {
WhichEl. style. display = 'none ';
Button. value = "alarm ";
}

ExpandOther (e1, el2 ),
The e1 parameter can specify the event object to be operated, for example, an Input button with the ID of inputshowData,
The el2 parameter can specify a region to be hidden, such as TABLE and div.
<Input name = "inputshowData" id = "inputshowData" value = "" type = "button" onclick = "expandOther ('datadiv ', 'inputshowdata')"/>
Id: datadiv data display Layer
The id is inputshowData.
HTML sample CODE:
Copy codeThe Code is as follows:
<Fieldset>
<Legend>
<Input name = "inputshowData" id = "inputshowData" value = "" type = "button" onclick = "expandOther ('datadiv ', 'inputshowdata ') "/> </legend>
<Div id = "datadiv" style = "width: 400PX; height: 100px; overflow: auto;">
<Asp: GridView ID = "GridView1" runat = "server" CellPadding = "4" ForeColor = "#333333" GridLines = "None">
<RowStyle BackColor = "# F7F6F3" ForeColor = "#333333"/>
<FooterStyle BackColor = "# 5D7B9D" Font-Bold = "True" ForeColor = "White"/>
<PagerStyle BackColor = "#284775" ForeColor = "White" HorizontalAlign = "Center"/>
<SelectedRowStyle BackColor = "# E2DED6" Font-Bold = "True" ForeColor = "#333333"/>
<HeaderStyle BackColor = "# 5D7B9D" Font-Bold = "True" ForeColor = "White"/>
<EditRowStyle BackColor = "#999999" type = "regxph" text = "yourobjectname"/>
<AlternatingRowStyle BackColor = "White" ForeColor = "#284775"/>
</Asp: GridView>
</Div>
</Fieldset>

Is it easy to find?
I personally think.
However, this layer has a scroll bar, mainly based on the style Attribute overflow: auto; and has a specified width and height.
If the width is not directly specified, the scroll bar is displayed based on the browser width,
If the height is not specified, the scroll bar is not displayed. I am not good at art artists. The privilege is recorded here today. You can look back and see how you understood and wrote the code at that time.