MediaWiki:Common.js

/** Collapsible tables *********************************************************
  *
  *  Description: Allows tables to be collapsed, showing only the header. See
  *               [[Wikipedia:NavFrame]].
  *  Taken from Wikipedia's Common.js.
  */

 var autoCollapse = 2;
 var collapseCaption = "hide";
 var expandCaption = "show";

 function collapseTable( tableIndex )
 {
     var Button = document.getElementById( "collapseButton" + tableIndex );
     var Table = document.getElementById( "collapsibleTable" + tableIndex );

     if ( !Table || !Button ) {
         return false;
     }

     var Rows = Table.rows;

     if ( Button.firstChild.data == collapseCaption ) {
         for ( var i = 1; i < Rows.length; i++ ) {
             Rows[i].style.display = "none";
         }
         Button.firstChild.data = expandCaption;
     } else {
         for ( var i = 1; i < Rows.length; i++ ) {
             Rows[i].style.display = Rows[0].style.display;
         }
         Button.firstChild.data = collapseCaption;
     }
 }

 function createCollapseButtons()
 {
     var tableIndex = 0;
     var NavigationBoxes = new Object();
     var Tables = document.getElementsByTagName( "table" );

     for ( var i = 0; i < Tables.length; i++ ) {
         if ( hasClass( Tables[i], "collapsible" ) ) {

             /* only add button and increment count if there is a header row to work with */
             var HeaderRow = Tables[i].getElementsByTagName( "tr" )[0];
             if (!HeaderRow) continue;
             var Header = HeaderRow.getElementsByTagName( "th" )[0];
             if (!Header) continue;

             NavigationBoxes[ tableIndex ] = Tables[i];
             Tables[i].setAttribute( "id", "collapsibleTable" + tableIndex );

             var Button     = document.createElement( "span" );
             var ButtonLink = document.createElement( "a" );
             var ButtonText = document.createTextNode( collapseCaption );

             Button.style.styleFloat = "right";
             Button.style.cssFloat = "right";
             Button.style.fontWeight = "normal";
             Button.style.textAlign = "right";
             Button.style.width = "6em";

             ButtonLink.style.color = Header.style.color;
             ButtonLink.setAttribute( "id", "collapseButton" + tableIndex );
             ButtonLink.setAttribute( "href", "javascript:collapseTable(" + tableIndex + ");" );
             ButtonLink.appendChild( ButtonText );

             Button.appendChild( document.createTextNode( "[" ) );
             Button.appendChild( ButtonLink );
             Button.appendChild( document.createTextNode( "]" ) );

             Header.insertBefore( Button, Header.childNodes[0] );
             tableIndex++;
         }
     }

     for ( var i = 0;  i < tableIndex; i++ ) {
         if ( hasClass( NavigationBoxes[i], "collapsed" ) || ( tableIndex >= autoCollapse && hasClass( NavigationBoxes[i], "autocollapse" ) ) ) {
             collapseTable( i );
         }
     }
 }

 addOnloadHook( createCollapseButtons );