function showNext(trida){
	//alert(trida);
	var elements = document.getElementsByTagName("div");
	for(i=0; i<elements.length; i++){
		if(elements[i].className=='aktual' || elements[i].className=='next' || elements[i].className=='next2'){
			elements[i].style.display='none';
		}
		if(elements[i].className==trida){
			elements[i].style.display='block';
		}
	}
	//alert(elements.length);
}

function changeClass(element){
//	alert(element.className);
	var elements = document.getElementsByTagName("a");
	for(i=0; i<elements.length; i++){
		if(elements[i].className=='next_odkaz_first_active'){
			elements[i].className = 'next_odkaz_first';
			
		}
		if(elements[i].className=='next_odkaz_active' || elements[i].className=='next_odkaz'  || elements[i].className=='next_odkaz_w'){
			if(element.className=='next_odkaz2' || element.className=='next_odkaz2_active'|| element.className=='next_odkaz2_w'){
				elements[i].className = 'next_odkaz_w';
				//alert('je tam');
			} else {
				elements[i].className = 'next_odkaz';
			}
			
		}
		if(elements[i].className=='next_odkaz2_active' || elements[i].className=='next_odkaz2'  || elements[i].className=='next_odkaz2_w'){
			if(element.className=='next_odkaz' || element.className=='next_odkaz_active' || element.className=='next_odkaz_w'){
				elements[i].className = 'next_odkaz2_w';
				//alert('je tam');
			} else {
				elements[i].className = 'next_odkaz2';
			}
			//alert('je tam');
		}
		
	}
	if(element.className=='next_odkaz_first_active' || element.className=='next_odkaz_first'){
		element.className = 'next_odkaz_first_active';
	}
	if(element.className=='next_odkaz' || element.className=='next_odkaz_active' || element.className=='next_odkaz_w'){
		element.className = 'next_odkaz_active';
	}
	if(element.className=='next_odkaz2' || element.className=='next_odkaz2_active' || element.className=='next_odkaz2_w'){
		element.className = 'next_odkaz2_active';
	}
	
}