Javascript controls html element display/hide implementation code

1. Compile js Functions
<Script type = "text/javascript">
Function display (y) {$ (y). style. display = ($ (y). style. display = "none ")? "": "None ";}
Function $ (s) {return document. getElementById (s );}
</Script>
2. Add the id attribute to the html element to be displayed/hidden
<Table>
<Tr id = "menu">
<Td> control the display/hide of this tr </td>
</Tr>
</Table>
3. Add buttons and links to trigger js functions.
<Input type = "button" onclick = "display ('menu ')" value = "show/hide"/>
<A href = "#" onclick = "display ('menu ')"> display/hide </a>
Javascript hide layer <div id = "layer" style = "display: none;"> advertisement </div>
<Input type = "botton" onclick = "display (layer)">
2. Two methods to hide and display page controls using javascript
Javascript controls the hidden display of page controls. The difference between the two methods is whether the controls are still occupied on the page after they are hidden.
Method 1:
Document. all ["PanelSMS"]. style. visibility = "hidden ";
Document. all ["PanelSMS"]. style. visibility = "visible ";
Method 2:
Document. all ["PanelSMS"]. style. display = "none ";
Document. all ["PanelSMS"]. style. display = "inline ";
Method 1 after hiding, the page location is still occupied by the control but not displayed.
Method 2 Hide and the page location is not occupied