window.onload=function(){
var el1=$('rasp_banner1');
var el11=$('games_banner1');
var el12=$('pkd1');
var el13=$('bonus_banner1');

Event.observe(el11,'mouseover',function(event)
{

     Element.setStyle(el1,'background-image:url(/images/4chb.jpg)');
})
Event.observe(el11,'mouseout',function(event)
{
     Element.setStyle(el1,'background-image:url(/images/4.jpg)');
})
Event.observe(el12,'mouseover',function(event)
{
     Element.setStyle(el1,'background-image:url(/images/4chb.jpg)');
})
Event.observe(el12,'mouseout',function(event)
{
     Element.setStyle(el1,'background-image:url(/images/4.jpg)');
})
Event.observe(el13,'mouseover',function(event)
{
     Element.setStyle(el1,'background-image:url(/images/4chb.jpg)');
})
Event.observe(el13,'mouseout',function(event)
{
     Element.setStyle(el1,'background-image:url(/images/4.jpg)');
})

//селекторы
}