/**
 * function show_hide()
 *
 * depending on element's current display state, show or hide this element
 * and change associated link's text
 *
 * @param string "element" (target element Id)
 * @param string "link" (associated link's Id)
 */
function show_hide(element, link) {
	switch (document.getElementById(element).style.display) {
		case "block":
			document.getElementById(element).style.display = "none";
			document.getElementById(link).innerHTML = "zobrazit kompletní informace";
			document.getElementById(link).title = "zobrazit kompletní informace";
			break;
		case "none":
			document.getElementById(element).style.display = "block";
			document.getElementById(link).innerHTML = "skrýt kompletní informace";
			document.getElementById(link).title = "skrýt kompletní informace";
			break;
	}
	document.getElementById(link).blur();
}