var divs = document.getElementsByTagName("div");
function selectLayer1(id){
    var Showdiv = id.split("_");
    var pdiv = Showdiv[0];
    var pdivkey = Showdiv[1];
    for(i=0;i<divs.length;i++){
        var divArr = divs[i].id.split("_");        
        if(divArr[0] == pdiv){            
        if(divArr[1] == pdivkey){
            getbyid(id).style.display="block";            
                }else{
            if(divArr[1] == "nav"){
                if(divArr[2] == pdivkey){
				   if (divs[i].id.indexOf('_a')!=-1)getbyid(divs[i].id).className = "currentnav0";
				   else if (divs[i].id.indexOf('_b')!=-1)getbyid(divs[i].id).className = "currentnav2";
                   else getbyid(divs[i].id).className = "currentnav";
                }else{
                   if (divs[i].id.indexOf('_a')!=-1)getbyid(divs[i].id).className = "subnav0";
				   else if (divs[i].id.indexOf('_b')!=-1)getbyid(divs[i].id).className = "subnav1";
                   else getbyid(divs[i].id).className = "subnav";
                }
            }else{
                getbyid(divs[i].id).style.display="none";                
                    }
                }
        }   
    }
}
function getbyid(id) {
    if (document.getElementById) {
        return document.getElementById(id);
    } else if (document.all) {
        return document.all[id];
    } else if (document.layers) {
        return document.layers[id];
    } else {
        return null;
    }
}