var div_name = "browse_page_";

var current_page = 0;

function bward(first_page, last_page)
{
	current_page--;
	if ( current_page < first_page ) current_page = first_page;
	show(first_page, last_page);
}

function fward(first_page, last_page)
{
	current_page++;
	if ( current_page > last_page ) current_page = last_page;
	show(first_page, last_page);
}

function first(first_page, last_page)
{
	current_page = first_page;
	show(first_page, last_page);
}

function last(first_page, last_page)
{
	current_page = last_page;
	show(first_page, last_page);
}

function show(first_page, last_page)
{
	for ( var i = first_page; i <= last_page; i++ )
	{
		var div = document.getElementById(div_name + i);
		if ( div )
		{
			if ( i == current_page )
			{
				div.style.display = 'block';
				div.style.visibility = "visible";
			}else// if ( i == current_page )
			{
				div.style.display = 'none';
				div.style.visibility = "hidden";
			}
		}// if (div)
	}// for i
	var div_current_page = document.getElementById('current_page');
	if ( div_current_page ) div_current_page.innerHTML = (current_page+1);
}