<html>
<head>
<title>example</title>
</head>
<body>
<select name="one">
<option value="blabla">Иван</option>
<option value="blabla2">Петр</option>
</select>
<select name="two">
<option value="blabla3">Иванов</option>
<option value="blabla4">Петров</option>
</select>
<input type="text" id="title">
<script src="http://code.jquery.com/jquery-1.11.1.min.js"></script>
<script>
var selects = $('select'),
title= $('#title');
selects.change(function ()
{
var values = [];
selects.each(function ()
{
values.push($(this).find(':selected').text());
});
title.val(values.join(' '));
});
</script>
</body>
</html>