var tm;
var menus=new Array('drop_menu_recycling','drop_menu_consultancy','drop_menu_portfolio','drop_menu_wamitab','drop_menu_environmental','drop_menu_health','drop_menu_hs_consultancy','drop_menu_management');

function init() {
    for(var i=0;i<menus.length;i++) {
        var id =  menus[i];
        document.getElementById(id).style.opacity=0.95;
        document.getElementById(id).style.filter='alpha(opacity=95)';
    }
}

function show(id) {
    if(tm) {
        clearTimeout(tm);
    }
    document.getElementById(id).style.display='block';
}

function hide(id) {
    tm = setTimeout('document.getElementById("'+id+'").style.display="none"',100);
}

function WindowOnload(f) {
    var prev=window.onload;
    window.onload=function(){ if(prev)prev(); f(); }
  }

WindowOnload(init);