old_el=null;
			
			function load() {
				//return;
				for (i=1;i>0;i++) {
					if (el=window.document.getElementById('s'+i)) {
						if (el.className=='active a') {
							old_el=el;
							el.className='active';
						} else
							el.className='';
						
					} else break;
				}
				window.document.body.className+=' js';
			}
			
			
			function show(elname) {
				if (old_el) {
					old_el.className='';
					if (old_el.id==elname) {
						old_el=null;
						return true;
					}
				}
				if (el=window.document.getElementById(elname)) {
					el.className='active';
					old_el=el;
				}
				return true;
			}
			
			function scroll(amount) {
				window.scrollTo(0,(window.document.body.scrollTop>0 ? window.document.body.scrollTop : window.document.documentElement.scrollTop)+amount);
			}
			
			function switchImage(src,popis) {
				el=window.document.getElementById('bigimage');
				el.src=src;
				el=window.document.getElementById('popis-foto');
				el.innerHTML=popis;
			}