var i1 = 3;
	var i2 = 3;
	var i3 = 3;
	var i4 = 3;
	var i5 = 3;
	var n1 = 0;
	var n2 = 0;
	var n3 = 0;
	var n4 = 0;
	var n5 = 0;
	var url = '';
	
	function next1() {
		
		n1 = i1+4;

		url = "http://www.rusgreat.com/cer2008.html#" + n1 +"";
		document.getElementById('main1').src = url;
		if (i1<21) {i1++;} else {i1=21;}
	}

		function prev1() {
		
		n1 = i1-3;
		
		url = "http://www.rusgreat.com/cer2008.html#" + n1 +"";
		document.getElementById('main1').src = url;
		if (i1>4) {i1--;} else {i1=3;}
	}

	function next2() {
		
		n2 = i2+4;

		url = "http://www.rusgreat.com/cer2007.html#" + n2 +"";
		document.getElementById('main2').src = url;
		if (i2<35) {i2++;} else {i2=35;}
	}

		function prev2() {
		
		n2 = i2-3;
		
		url = "http://www.rusgreat.com/cer2007.html#" + n2 +"";
		document.getElementById('main2').src = url;
		if (i2>4) {i2--;} else {i2=3;}
	}

	function next3() {
		
		n3 = i3+4;

		url = "http://www.rusgreat.com/cer2006.html#" + n3 +"";
		document.getElementById('main3').src = url;
		if (i3<28) {i3++;} else {i3=28;}
	}

		function prev3() {
		
		n3 = i3-3;
		
		url = "http://www.rusgreat.com/cer2006.html#" + n3 +"";
		document.getElementById('main3').src = url;
		if (i3>4) {i3--;} else {i3=3;}
	}

	function next4() {
		
		n4 = i4+4;

		url = "http://www.rusgreat.com/cer2005.html#" + n4 +"";
		document.getElementById('main4').src = url;
		if (i4<52) {i4++;} else {i4=52;}
	}

		function prev4() {
		
		n4 = i4-3;
		
		url = "http://www.rusgreat.com/cer2005.html#" + n4 +"";
		document.getElementById('main4').src = url;
		if (i4>4) {i4--;} else {i4=3;}
	}


	function next5() {
		
		n5 = i5+4;

		url = "http://www.rusgreat.com/places.html#" + n5 +"";
		document.getElementById('main1').src = url;
		if (i5<4) {i5++;} else {i5=5;}
	}

		function prev5() {
		
		n5 = i5-2;
		
		url = "http://www.rusgreat.com/places.html#" + n5 +"";
		document.getElementById('main1').src = url;
		if (i5>3) {i5--;} else {i5=3;}
	}