// Útvary v textu nástěnky - díky webu wormscesky.cz
function insert(before, after) {
  var pole = document.getElementById("vzkaz");
	/* Mozilla, Opera */
	if (pole.setSelectionRange) {
 		var start = pole.selectionStart;
 		var end = pole.selectionEnd;
 		var pos = start + before.length;
 		pole.focus();
 		pole.value = pole.value.substring(0, start) + before + pole.value.substring(start, end) + after + pole.value.substring(end);
 		pole.setSelectionRange(pos, pos);
 	}
		/* IE */
		else if (document.selection) {
	 		pole.focus();
	 		document.selection.createRange().text = before + document.selection.createRange().text + after;
		}
}

function reagovat(cislo) {
document.getElementById("reakce").value = cislo
if(cislo == "---") {
document.getElementById('dont_react').style.visibility = 'hidden'
} else {
document.getElementById('dont_react').style.visibility = 'visible'
document.getElementById('prezdivka').focus()
}
}