function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

var LayerManager = {};
LayerManager.mouseObserve = function(elmnts, overHandler, outHandler){
    if(!elmnts || elmnts.length < 1)
        return;

    elmnts.each(function(el){
        try {
            if(!el) return;
            Event.observe(el, "mouseover", overHandler);
            Event.observe(el, "mouseout", outHandler);        
        } catch(ex){}
    });
}

function setHeaderLayer(){
    var branchList = ["branchBook1","branchBook2","branchBook3","branchBook4","branchBook5","branchBook6","branchBook7","branchBook8","branchBook9","branchBook10"];

    branchList.each(function(aBranch){
        if(!$(aBranch))
            return;
        
        Event.observe($(aBranch), "mouseover", function(){  
            Element.show(aBranch+"Layer");
        });
        Event.observe($(aBranch), "mouseout", function(){   
            Element.hide(aBranch+"Layer");
        });
        Event.observe($(aBranch+"Layer"), "mouseover", function(){  
            Element.show(aBranch+"Layer");
        });
        Event.observe($(aBranch+"Layer"), "mouseout", function(){   
            Element.hide(aBranch+"Layer");
        });
    });
}