function ToggleLayer( whichLayer )
{ 
    /* http://www.netlobo.com/div_hiding.html */

    var elem, vis;  
    
    if( document.getElementById ) // this is the way the standards work    
        elem = document.getElementById( whichLayer );  
    else if( document.all ) // this is the way 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 the style.display value is blank we try to figure it out here  
    if(vis.display==''&&elem.offsetWidth!=undefined&&elem.offsetHeight!=undefined)    
        vis.display = (elem.offsetWidth!=0&&elem.offsetHeight!=0)?'block':'none';  
        
    vis.display = (vis.display==''||vis.display=='block')?'none':'block';
}

function ShowElement( ElementId )
{ 
    var elem, vis;  
    
    if( document.getElementById ) // this is the way the standards work    
        elem = document.getElementById( ElementId ); 
    else if( document.all ) // this is the way old msie versions work      
        elem = document.all[ElementId];  
    else if( document.layers ) // this is the way nn4 works    
        elem = document.layers[ElementId];  

    vis = elem.style;  
    
    // if the style.display value is blank we try to figure it out here  
    if(vis.display==''&&elem.offsetWidth!=undefined&&elem.offsetHeight!=undefined)    
        vis.display = (elem.offsetWidth!=0&&elem.offsetHeight!=0)?'block':'none';  
        
    vis.display = 'block';
}

function HideElement( ElementId )
{ 
    var elem, vis;  
    
    if( document.getElementById ) // this is the way the standards work    
        elem = document.getElementById( ElementId ); 
    else if( document.all ) // this is the way old msie versions work      
        elem = document.all[ElementId];  
    else if( document.layers ) // this is the way nn4 works    
        elem = document.layers[ElementId];  

    vis = elem.style;  

    // if the style.display value is blank we try to figure it out here  
    if(vis.display==''&&elem.offsetWidth!=undefined&&elem.offsetHeight!=undefined)    
        vis.display = (elem.offsetWidth!=0&&elem.offsetHeight!=0)?'block':'none';  
        
    vis.display = 'none';
}

function SetElementClass( ElementId, Class )
{ 
    var elem, vis;  
    
    if( document.getElementById ) // this is the way the standards work    
        elem = document.getElementById( ElementId ); 
    else if( document.all ) // this is the way old msie versions work      
        elem = document.all[ElementId];  
    else if( document.layers ) // this is the way nn4 works    
        elem = document.layers[ElementId];  
   
    // Change class on element
    elem.className=Class;    
}