var max_menu=1000;

var menu_array=new Array();
for (i=0; i<=max_menu; i++){
        menu_array[i]=0;
}

var select_method; //DOM type
var nn=false;
var domb=false;
var msie=false;

function set_browser(){
        if (document.getElementById){
                select_method="getElementById";
                domb=!domb;

        }
        else if (document.all){
                select_method="all";
                msie=!msie

        }
        else if (document.layers){
                nn=!nn;
        }
        else {
                alert("Browser is not defined!");
        }
}

set_browser();

function set_visible_ie(div_id){
        eval("document."+select_method+"('id"+div_id+"').style.visibility='visible'");
        eval("document."+select_method+"('id"+div_id+"').style.position='relative'");
        eval("document."+select_method+"('id"+div_id+"').style.top='0px'");
        eval("document.arrow_"+div_id+".src='imgs/menu-arrow-down.gif'");
}

function set_hide_ie(div_id){
        eval("document."+select_method+"('id"+div_id+"').style.visibility='hidden'");
        eval("document."+select_method+"('id"+div_id+"').style.position='absolute'");
        eval("document."+select_method+"('id"+div_id+"').style.top='-2000px'");
        eval("document.arrow_"+div_id+".src='imgs/menu-arrow-left.gif'");
}

function set_change(div_id){
        if ((domb)||(msie)){
                if (menu_array[div_id]==0){
                        set_visible_ie(div_id);
                        menu_array[div_id]=1;
                }
                else {
                        set_hide_ie(div_id);
                        menu_array[div_id]=0;
                }
        }
}

function show_block(div_id){
        if (!nn){
                eval("document."+select_method+"('"+div_id+"').style.visibility='visible'");
                eval("document."+select_method+"('"+div_id+"').style.position='relative'");
                eval("document."+select_method+"('"+div_id+"').style.top='0px'");
                }
        }