document.getElementsByClassName = function(cl) {
        var retnode = [];
        var myclass = new RegExp('\\b'+cl+'\\b');
        var elem = this.getElementsByTagName('*');
        for (var i = 0; i < elem.length; i++) {
        var classes = elem[i].className;
        if (myclass.test(classes)) retnode.push(elem[i]);
        }
        return retnode;
	};


	function show_persistent() {
		var i = 0;

		var gold = document.getElementsByClassName('price_gold');
		i = 0;
		while(gold[i]) {
			gold[i].style.display = 'none';
			i++;
		}

		var price = document.getElementsByClassName('price');
		i = 0;
		while(price[i]) {
			price[i].style.display = 'none';
			i++;
		}

		var silver = document.getElementsByClassName('price_silver');
		i = 0;
		while(silver[i]) {
			silver[i].style.display = 'none';
			i++;
		}

		var pers = document.getElementsByClassName('price_persistent');
		i = 0;
		while(pers[i]) {
			pers[i].style.display = 'block';
			i++;
		}
	};


	function show_silver() {
		var i = 0;

		var silver = document.getElementsByClassName('price_silver');
		i = 0;
		while(silver[i]) {
			silver[i].style.display = 'block';
			i++;
		}

		var price = document.getElementsByClassName('price');
		i = 0;
		while(price[i]) {
			price[i].style.display = 'none';
			i++;
		}

		var gold = document.getElementsByClassName('price_gold');
		i = 0;
		while(gold[i]) {
			gold[i].style.display = 'none';
			i++;
		}

		var pers = document.getElementsByClassName('price_persistent');
		i = 0;
		while(pers[i]) {
			pers[i].style.display = 'none';
			i++;
		}


	};



	function show_gold() {
		var i = 0;

		var gold = document.getElementsByClassName('price_gold');
		i = 0;
		while(gold[i]) {
			gold[i].style.display = 'block';
			i++;
		}

		var price = document.getElementsByClassName('price');
		i = 0;
		while(price[i]) {
			price[i].style.display = 'none';
			i++;
		}

		var silver = document.getElementsByClassName('price_silver');
		i = 0;
		while(silver[i]) {
			silver[i].style.display = 'none';
			i++;
		}

		var pers = document.getElementsByClassName('price_persistent');
		i = 0;
		while(pers[i]) {
			pers[i].style.display = 'none';
			i++;
		}


	}