function sw_rl(type) {
	document.getElementById('r').style.display = (type == 'r' ? '' : 'none');
	document.getElementById('l').style.display = (type == 'l' ? '' : 'none');		
}

function sw_pt(type) {
	document.getElementById('w').style.display = (type == 'w' ? '' : 'none');
	document.getElementById('i').style.display = (type == 'i' ? '' : 'none');
	document.getElementById('p').style.display = (type == 'p' ? '' : 'none');
}

var numFiles = 0;

function addFile() {
	numFiles++; 
	var elm = document.createElement("div"); 
	elm.id = 'file_' + numFiles; 
	var html = "";  
	html += '<table class="file" cellspacing="3" cellpadding="3"><tr><td>Файл с анализами<span class="asterisk">**</span>:</td>';
	html += '<td><input type="file" name="files[]"></td>';
	html += '<td><input type="button" value="Удалить" onClick="delFile(\'file_' + numFiles + '\')"></td>';
	html += '</tr></table>'; 
	elm.innerHTML = html; 
	document.getElementById('div-files').appendChild(elm); 
}

function delFile(id) {
 var elm = document.getElementById(id); 
	if (elm)
	 elm.parentNode.removeChild(elm); 
} 

function checkLen() {
 maxlen = 2500;
 q = document.getElementById('question');
	l = document.getElementById('chars_left');
	s = q.value;	
	if (s.length > maxlen) {
	 q.value = s.substring(0, maxlen);
		l.value = 0;
	} else 
		l.value = maxlen - s.length;					
}