function Vstate(layerRef)
              {
                  var blockElement=document.getElementById(layerRef);
                  
                     blockElement.style.visibility='visible';
                   
              }
              function Hstate(layerRef)
              {
                  var blockElement=document.getElementById(layerRef);
                  
                     blockElement.style.visibility='hidden';
              }
   


   
              
function change_position(lyr,x,y) 
{
	document.all[lyr].style.visibility = "visible";
	document.all[lyr].style.left=x;
  document.all[lyr].style.top=y; 

}

function hide_all(num)
{
 for(i=0;i<num;i++)
 {
   id='nr'+i;
           blockElement=document.getElementById(id);       
          blockElement.style.visibility='hidden';
    
 }
}

function visible_one(num)
{
  id='nr'+num;
 
  blockElement=document.getElementById(id);
  blockElement.style.visibility='visible';
    


 
}

function hide_all1(num)
{
 for(i=0;i<num;i++)
 {
   id='nr1'+i;
           blockElement=document.getElementById(id);       
          blockElement.style.visibility='hidden';
    
 }
 

}

function visible_one1(num)
{
  id='nr1'+num;
  var blockElement=document.getElementById(id);
  blockElement.style.visibility='visible';
}


function hide_all2(num)
{
 for(i=0;i<num;i++)
 {
   id='nr2'+i;
           blockElement=document.getElementById(id);       
          blockElement.style.visibility='hidden';
    
 }
}

function visible_one2(num)
{
  id='nr2'+num;
  var blockElement=document.getElementById(id);
  blockElement.style.visibility='visible';
}
function cursor_pointer(elem)
{
   elem.style.cursor='pointer';
}