function smallMapRov(pathToRov){
$(pathToRov).mouseover(function(){
	$(this).attr("src",$(this).attr("src").replace(/^(.+)(\.[a-z]+)$/, "$1_on$2"))
	}).mouseout(function(){
	$(this).attr("src",$(this).attr("src").replace(/^(.+)_on(\.[a-z]+)$/, "$1$2"));
	}).each(function(){
	$("<img>").attr("src",$(this).attr("src").replace(/^(.+)(\.[a-z]+)$/, "$1_on$2"))
})	
}

$(function(){
smallMapRov("#mailbox>a>img");


});