for (var i = 0; i < titles.length; i++) {
titles[i].value = i;
titles[i].onmouseover = function(){
for (var j = 0; j < titles.length; j++) {
titles[j].className = "";
news[j].style.display = 'none';
}
this.className = 'select';
news[this.value].style.display = 'block';
}
}