function zmena()
  {
index = Math.ceil(Math.random()*obr.length);
document.getElementById("ramecek_maly").style.backgroundImage="url('"+obr[index]+"')";	  
   }	  


function sup(co)
 {
	pryc(); 
document.getElementById(co).style.visibility="visible";	 
	 
	 
	 
	 
}	


 

function vyjed(a,odkud)
    {
		if (navigator.appName == 'Netscape')
         {
         	    
	       document.captureEvents(Event.MOUSEMOVE);			
              document.getElementById(odkud).onmousemove = NNMouseMove;
               	
          }
          else
          {
                x=event.clientX;
                y=event.clientY;
                
                //poloha(y);          

          };
          
          
          
        

        function NNMouseMove(event) 
        {
          x=event.clientX;
          y=event.clientY;
          //poloha(y);
     
              
          };
                   
        
     

        
        //document.getElementById(a).style.top=y;
        //x=x-yy;	
        x=x-10; 
      
        pryc();
        //tajm();
        //dalsi="c"+a;
        //xdalsi=x+2;
       
        document.getElementById(a).style.left=x;
        //document.getElementById(a).style.top=y;
        document.getElementById(a).style.visibility='visible';
        
       //document.getElementById(dalsi).style.left=xdalsi;
        //document.getElementById(dalsi).style.top=yy;
        //document.getElementById(dalsi).style.visibility='visible';
        //
       
	}


    		

function stred()
    {
	sirka=document.body.clientWidth;
	if(sirka>900)
	    {
		rozdil=sirka-900;
		yy=rozdil/2;	
		}
	else
	    {
		yy=0;	
		}			
	document.getElementById("cele").style.left=yy;	
	}