function swap(n)
{
        if ( n==0 )document.images.click.src = "images/menu_home.gif";
        if ( n==1 )document.images.click.src = "images/menu_home_over.gif";        

        if ( n==2 )document.images.click1.src = "images/menu_client.gif";
        if ( n==3 )document.images.click1.src = "images/menu_client_over.gif"; 
        
        if ( n==4 )document.images.click2.src = "images/menu_services.gif";
        if ( n==5 )document.images.click2.src = "images/menu_services_over.gif"; 
        
        if ( n==6 )document.images.click3.src = "images/menu_aboutus.gif";
        if ( n==7 )document.images.click3.src = "images/menu_aboutus_over.gif"; 
        
        if ( n==8 )document.images.click4.src = "images/menu_enqs.gif";
        if ( n==9 )document.images.click4.src = "images/menu_enqs_over.gif"; 
        
        if ( n==10 )document.images.click5.src = "images/menu_contact.gif";
        if ( n==11 )document.images.click5.src = "images/menu_contact_over.gif"; 
        
        }
        
function check (chin)
         {
         alert(chin);
         }