var timeout         = 500;
var closetimer		= 200;
var ddmenuitem      = 0;

// open hidden layer
function mopen(id)
{	
	// cancel close timer
	mcancelclosetime();

	// close old layer
	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';

	// get new layer and show it
	ddmenuitem = document.getElementById(id);
	ddmenuitem.style.visibility = 'visible'; 
    changeImage(id)
}
 function changeImage(Imgid)
 { 
   switch (Imgid) 
   {
       case "m1":
        
           document.getElementById("IMGM1").src ="App_Themes/NIMG/menu_corporate_mo.gif";
           document.getElementById("IMGM2").src ="App_Themes/NIMG/menu_products.gif";
           document.getElementById("IMGM3").src ="App_Themes/NIMG/menu_services.gif" ;
           document.getElementById("IMGM4").src ="App_Themes/NIMG/menu_clientspartners.gif";
           document.getElementById("IMGM5").src="App_Themes/NIMG/menu_contact.gif";
         break; 
 
     case "m2":
     
          document.getElementById("IMGM1").src ="App_Themes/NIMG/menu_corporate.gif";
           document.getElementById("IMGM2").src ="App_Themes/NIMG/menu_products_mo.gif";
           document.getElementById("IMGM3").src ="App_Themes/NIMG/menu_services.gif" ;
           document.getElementById("IMGM4").src ="App_Themes/NIMG/menu_clientspartners.gif";
           document.getElementById("IMGM5").src="App_Themes/NIMG/menu_contact.gif";
         break;
     case "m3":
          document.getElementById("IMGM1").src ="App_Themes/NIMG/menu_corporate.gif";
           document.getElementById("IMGM2").src ="App_Themes/NIMG/menu_products.gif";
           document.getElementById("IMGM3").src ="App_Themes/NIMG/menu_services_mo.gif" ;
           document.getElementById("IMGM4").src ="App_Themes/NIMG/menu_clientspartners.gif";
           document.getElementById("IMGM5").src="App_Themes/NIMG/menu_contact.gif";
         break;
      case "m4":
          document.getElementById("IMGM1").src ="App_Themes/NIMG/menu_corporate.gif";
           document.getElementById("IMGM2").src ="App_Themes/NIMG/menu_products.gif";
           document.getElementById("IMGM3").src ="App_Themes/NIMG/menu_services.gif" ;
           document.getElementById("IMGM4").src ="App_Themes/NIMG/menu_clientspartners_mo.gif";
           document.getElementById("IMGM5").src="App_Themes/NIMG/menu_contact.gif";
         break;
      case "m5":
           document.getElementById("IMGM1").src ="App_Themes/NIMG/menu_corporate.gif";
           document.getElementById("IMGM2").src ="App_Themes/NIMG/menu_products.gif";
           document.getElementById("IMGM3").src ="App_Themes/NIMG/menu_services.gif" ;
           document.getElementById("IMGM4").src ="App_Themes/NIMG/menu_clientspartners.gif";
           document.getElementById("IMGM5").src="App_Themes/NIMG/menu_contact_mo.gif";
         break;
         case "m99":
           document.getElementById("IMGM1").src ="App_Themes/NIMG/menu_corporate.gif";
           document.getElementById("IMGM2").src ="App_Themes/NIMG/menu_products.gif";
           document.getElementById("IMGM3").src ="App_Themes/NIMG/menu_services.gif" ;
           document.getElementById("IMGM4").src ="App_Themes/NIMG/menu_clientspartners.gif";
           document.getElementById("IMGM5").src="App_Themes/NIMG/menu_contact.gif";
         break;
       }
   
 }
// close showed layer
function mclose()
{
	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';
	changeImage('m99')
}

// go close timer
function mclosetime()
{
	closetimer = window.setTimeout(mclose, timeout);
}

// cancel close timer
function mcancelclosetime()
{
	if(closetimer)
	{
		window.clearTimeout(closetimer);
		closetimer = null;
	}
}

// close layer when click-out
document.onclick = mclose; 
// -->