function showMenu(mnuNum)
    {
    
    switch( mnuNum )
    {
    
    case 1 : 
                document.frontpage.src='home_button.gif';
                showOnlyDiv(1);                          
//                document.getElementById('divSubMenu1').style.display = 'block';
                
            break;
            
    case 11 : 
                document.showdiary.src='diary_subbutton.gif';
                document.getElementById('divSubMenu1').style.display = 'block';
                
            break;
            
    case 12 : 
                document.bookmark.src='bookmark_subbutton.gif';
                document.getElementById('divSubMenu1').style.display = 'block';
                
            break;                        
    
    case 13 : 
                document.contactus.src='contactus_subbutton.gif';
                document.getElementById('divSubMenu1').style.display = 'block';
                
            break;             
            
    case 2 :
                document.archive.src='tenders_button.gif' ;
                showOnlyDiv(2);                          
             break;            
                                                  
            
    case 3 :
                document.referenc.src='awards_button.gif' ;
                showOnlyDiv(3);                          
             break;            
             
   
    case 4 :
                document.recbreaker.src='references_button.gif' ;
                showOnlyDiv(4);                          
             break;            
             
            
    case 41 : 
                document.chemofhrr.src='tunnelmachines_subbutton.gif';
                document.getElementById('divSubMenu4').style.display = 'block';
                
            break;                                                                          
    case 42 : 
                document.cmdoferrs.src='tunnelconsultants_subbutton.gif';
                document.getElementById('divSubMenu4').style.display = 'block';
                
            break;  
            
    case 43 : 
                document.tdreams.src='magazines_subbutton.gif';
                document.getElementById('divSubMenu4').style.display = 'block';
                
            break;                                                                                                  

    case 5 :
                document.supplier.src='sales_button.gif' ;
                showOnlyDiv(5);                          
             break;            
             
     case 51 : 
                document.team.src='team.gif';
                document.getElementById('divSubMenu5').style.display = 'block';
                
            break;  
 
    case 6 :
                document.jobs.src='oldnews_button.gif' ;
                showOnlyDiv(6);                          
             break;    
   
    }
    
    
    
    }
    
    
    
        function hideMenu(mnuNum)
    {
    
    switch( mnuNum )
    {
    
     case 1 : 
                document.frontpage.src='home_button.gif';
                showOnlyDiv(1);                          
//                document.getElementById('divSubMenu1').style.display = 'block';
                
            break;
            
    case 11 : 
                document.showdiary.src='diary_subbutton.gif';
                document.getElementById('divSubMenu1').style.display = 'block';
                
            break;
            
    case 12 : 
                document.bookmark.src='bookmark_subbutton.gif';
                document.getElementById('divSubMenu1').style.display = 'block';
                
            break;                        
    
    case 13 : 
                document.contactus.src='contactus_subbutton.gif';
                document.getElementById('divSubMenu1').style.display = 'block';
                
            break;             
            
    case 2 :
                document.archive.src='tenders_button.gif' ;
                showOnlyDiv(2);                          
             break;            
                                                  
            
    case 3 :
                document.referenc.src='awards_button.gif' ;
                showOnlyDiv(3);                          
             break;            
             
   
    case 4 :
                document.recbreaker.src='references_button.gif' ;
                showOnlyDiv(4);                          
             break;            
             
   
            
    case 41 : 
                document.chemofhrr.src='tunnelmachines_subbutton.gif';
                document.getElementById('divSubMenu4').style.display = 'block';
                
            break;                                                                          
    case 42 : 
                document.cmdoferrs.src='tunnelconsultants_subbutton.gif';
                document.getElementById('divSubMenu4').style.display = 'block';
                
            break;  
            
    case 43 : 
                document.tdreams.src='magazines_subbutton.gif';
                document.getElementById('divSubMenu4').style.display = 'block';
                
            break;                                                                                                  

    case 5 :
                document.supplier.src='sales_button.gif' ;
                showOnlyDiv(5);                          
             break;            
                      
     case 51 : 
                document.team.src='team.gif';
                document.getElementById('divSubMenu5').style.display = 'block';
                
            break;      
 
    case 6 :
                document.jobs.src='oldnews_button.gif' ;
                showOnlyDiv(6);                          
             break;                                                                                
    
    }
    
    
    
    }
    
    
    function hideSubMenuBar()
    {
         document.getElementById('divSubMenu1').style.display = 'none';
         document.getElementById('divSubMenu4').style.display = 'none';                                   
         document.getElementById('divSubMenu5').style.display = 'none'; 
    }
    
    function showOnlyDiv(divNum)
    {
        switch(divNum)
        {
        
        case 1 : 
                    hideSubMenuBar();
                    document.getElementById('divSubMenu1').style.display = 'block';
                    break;
        
        case 4 : 
                    hideSubMenuBar();
                    document.getElementById('divSubMenu4').style.display = 'block';        
                    break;                                                                                                    
     
	    case 5 : 
                    hideSubMenuBar();
                    document.getElementById('divSubMenu5').style.display = 'block';        
                    break; 
	                
        }
    
    
    }