function setclass(a)
{
document.getElementById('moscow').className = a;

}
window.onload = function ()
{

var aw = new Array
aw = document.getElementsByTagName("area")
var i = 0
while(aw[i])
{
var myid = aw[i].id
aw[i].onmouseover = function(){ setclass(this.id);}
aw[i].onmouseout = function(){setclass('mapa');}
i+=1

}
}