function bv_nextpage(id)
{
  
  
  switch(id)
  {
   	case 'rsbook1':
		 pagearray = rsbook1;
		 break;
	case 'rsbook2':
		pagearray = rsbook2;
		break;
  }
  
  el = document.getElementById(id);
  
  el.count = (el.count + 1) % pagearray.length;
  
  //Display new image in array
  el.src = pagearray[el.count];
	   
  // Show Page number status
  bv_showstatus(id,pagearray);
	   
}	

function bv_prevpage(id)
{

  switch(id)
  {
   	case 'rsbook1':
		 pagearray = rsbook1;
		 break;
	case 'rsbook2':
		pagearray = rsbook2;
		break;
  }
  
  el = document.getElementById(id);
  
  //Decrements counter if higher than 0 or moves to last image if at 0
  if (el.count > 0) {el.count = el.count - 1;}
  else {el.count = pagearray.length - 1;}  
  
  //Display new image in array
  el.src = pagearray[el.count];
	   
  // Show Page number status
  bv_showstatus(id,pagearray);
}

function bv_initialize(id)
{

  switch(id)
  {
   	case 'rsbook1':
		 pagearray = rsbook1;
		 break;
	case 'rsbook2':
		pagearray = rsbook2;
		break;
  }
  
  el = document.getElementById(id);
  
  //Set the Element Counter to 0
  el.count = 0;
  
  
  //Display new image in array
  el.src = pagearray[el.count];
	   
  // Show Page number status
  bv_showstatus(id,pagearray);
}

function bv_showstatus(id,page)
{
 	statusline = id + "status";
	var el = document.getElementById(id);
	
	document.getElementById(statusline).innerHTML = 'Page ' + (el.count+1) + ' of ' + page.length;
	
}