/* var currentHolder = 1;
var num_holders = 1;
var nextHolder = function () {
	var nextHolder=currentHolder+num_holders;
	if (!document.getElementById('holder'+nextHolder)) return;
	document.getElementById('holder'+1).style.display='none';
	document.getElementById('holder'+currentHolder).style.display='none';
	currentHolder++;
	document.getElementById('holder'+nextHolder).style.display='block';
	};
var prevHolder = function () {
	if(currentHolder==1) return;
	var prevHolder=currentHolder-1;
	document.getElementById('holder'+currentHolder).style.display='none';
	currentHolder--;
	document.getElementById('holder'+prevHolder).style.display='block';
	};
*/
// var total = 26;
// var range = [1, 6];
var nextThumb = function() {
	if (range[1] == total) {
  range = [1, 3];  // whatever the initial numbers are
  for (var i = 1; i < total; ++i) {
    document.getElementById('c_item' + i).style.display = range[0] <= i && i <= range[1] ? 'inline' : 'none';
  }
  return;
}
	document.getElementById('c_item' + (range[0]++)).style.display = 'none';
	document.getElementById('c_item' + (++range[1])).style.display = 'inline';
}
var prevThumb = function() {
	if (range[0] == 1) {
 range = [total - 2, total];
 for (var i = 1; i < total; ++i) {
   document.getElementById('c_item' + i).style.display = range[0] <= i && i <= range[1] ? 'inline' : 'none';
 }
 return;
}
	document.getElementById('c_item' + (--range[0])).style.display = 'inline';
	document.getElementById('c_item' + (range[1]--)).style.display = 'none';
}


/*
var nextPress = function() {
	if (prange[1] == ptotal) { return; }
	document.getElementById('p_item' + (prange[0]++)).style.display = 'none';
	document.getElementById('p_item' + (++prange[1])).style.display = 'inline';
}
var prevPress = function() {
	if (prange[0] == 1) { return; }
	document.getElementById('p_item' + (--prange[0])).style.display = 'inline';
	document.getElementById('p_item' + (prange[1]--)).style.display = 'none';
} */

var nextPress = function() {
	if (range[1] == total) {
		return;
//		range = [1, 3];  // whatever the initial numbers are
  for (var i = 1; i < total; ++i) {
    document.getElementById('p_item' + i).style.display = range[0] <= i && i <= range[1] ? 'inline' : 'none';
  }
  return;
}
	document.getElementById('p_item' + (range[0]++)).style.display = 'none';
	document.getElementById('p_item' + (++range[1])).style.display = 'inline';
}
var prevPress = function() {
	if (range[0] == 1) {
 return;
 for (var i = 1; i < total; ++i) {
   document.getElementById('p_item' + i).style.display = range[0] <= i && i <= range[1] ? 'inline' : 'none';
 }
 return;
}
	document.getElementById('p_item' + (--range[0])).style.display = 'inline';
	document.getElementById('p_item' + (range[1]--)).style.display = 'none';
}





var currentHolder = 1;
var num_holders = 1;
var nextHolder = function () {
	var nextHolder=currentHolder+num_holders;
	if (!document.getElementById('holder'+nextHolder)) return;
	document.getElementById('holder'+1).style.display='none';
	document.getElementById('holder'+currentHolder).style.display='none';
	currentHolder++;
	document.getElementById('holder'+nextHolder).style.display='block';
	};
var prevHolder = function () {
	if(currentHolder==1) return;
	var prevHolder=currentHolder-1;
	document.getElementById('holder'+currentHolder).style.display='none';
	currentHolder--;
	document.getElementById('holder'+prevHolder).style.display='block';
	};

/*
var changeHolder = function(id) {
		if (!currentContent) {
			var currentContent = document.getElementById(id).style.display;
			alert(currentContent);
			}
		}
	
	if (range[1] == total) { return; }
	document.getElementById('c_item' + (range[0]++)).style.display = 'none';
	document.getElementById('c_item' + (++range[1])).style.display = 'inline';
}
var prevThumb = function() {
	if (range[0] == 1) { return; }
	document.getElementById('c_item' + (--range[0])).style.display = 'inline';
	document.getElementById('c_item' + (range[1]--)).style.display = 'none';
}
*/