function showTube ( whichLayer, linkLayer, bgLayer ){ 
    
    var elem, elemLink, elemBg; 
    var vis, visLink, visBg;
    var elem_name, elem_nameLink, elem_Bg;
    
    if( document.getElementById ){
        elem = document.getElementById( whichLayer );
        elemLink = document.getElementById( linkLayer );
        elemBg = document.getElementById( bgLayer );
    }
    else if( document.all ){ // old msie versions work
        elem = document.all[whichLayer];
        elemLink = document.all[linkLayer];
        elemBg = document.all[bgLayer];
    }
    else if( document.layers ){ // this is the way nn4 works
        elem = document.layers[whichLayer];
        elemLink = document.layers[linkLayer];
        elemBg = document.layers[bgLayer];
    }

    vis = elem.style;
    visLink = elemLink.style;
    visBg = elemBg.style;
    
    if(vis.display == '' || vis.display=='none'){
        vis.display = 'block';
    }
    
    visLink.display = 'block';
    visLink.color = '#cc0000';
    visLink.textDecoration = 'none';
    
    visBg.background = 'transparent url(/stc/img/bg_tubeLine_act.gif) 0 0 no-repeat';
    
    var i;
    for(i=1; i<5; i++){
        elem_name = 'tubeItem' + i;
        elem_nameLink = 'tubeLink' + i;
        elem_Bg = 'tubeBg' + i;
        if(elem_name != whichLayer){
            if( document.getElementById ){
                elem = document.getElementById( elem_name );
                elemLink = document.getElementById( elem_nameLink );
                elemBg = document.getElementById( elem_Bg );
            }
            else if( document.all ){ // old msie versions work
                elem = document.all[elem_name];
                elemLink = document.all[elem_nameLink];
                elemBg = document.all[elem_Bg];
            }
            else if( document.layers ){ // this is the way nn4 works
                elem = document.layers[elem_name];
                elemLink = document.layers[elem_nameLink];
                elemBg = document.layers[elem_Bg];
            }
            
            if(elem){
                vis = elem.style;
                if(vis.display == '' || vis.display=='block')
                    vis.display = 'none';
                
                visLink = elemLink.style;
                visBg = elemBg.style;
                
                visLink.display = '';
                visLink.color = '';
                visLink.textDecoration = '';

                visBg.background = 'url(/stc/img/bg_tubeLine.gif) 0 0 repeat-x';
            } 
        }

        elem_name = 'newItem' + i;
        if( document.getElementById )
            elem = document.getElementById( elem_name );
        else if( document.all ) // old msie versions work
            elem = document.all[elem_name];
        else if( document.layers ) // this is the way nn4 works
            elem = document.layers[elem_name];
        
        if(elem){
            vis = elem.style;
            if(vis.display == '' || vis.display=='block')
                vis.display = 'none';
        }

    }

}

<!--
/*
function showContent ( whichLayer ){ 
    
    var elem, vis, elem_name;
    
    if( document.getElementById )
        elem = document.getElementById( whichLayer );
    else if( document.all ) // old msie versions work
        elem = document.all[whichLayer];
    else if( document.layers ) // this is the way nn4 works
        elem = document.layers[whichLayer];

    vis = elem.style;
    
    if(vis.display == '' || vis.display=='none')
        vis.display = 'block';
    
    var i;
    for(i=1; i<5; i++){
        elem_name = 'newItem' + i;
        if(elem_name != whichLayer){
            if( document.getElementById )
                elem = document.getElementById( elem_name );
            else if( document.all ) // old msie versions work
                elem = document.all[elem_name];
            else if( document.layers ) // this is the way nn4 works
                elem = document.layers[elem_name];
            
            if(elem){
                vis = elem.style;
                if(vis.display == '' || vis.display=='block')
                    vis.display = 'none';
            } 
        }
        
        elem_name = 'tubeItem' + i;
        if( document.getElementById )
            elem = document.getElementById( elem_name );
        else if( document.all ) // old msie versions work
            elem = document.all[elem_name];
        else if( document.layers ) // this is the way nn4 works
            elem = document.layers[elem_name];
        
        if(elem){
            vis = elem.style;
            if(vis.display == '' || vis.display=='block')
                vis.display = 'none';
        } 
    }

}
*/
-->