var menu = 0;
function sub_menu_over() {
  switch (menu)
  {
    case 1:home_menu_over();break;
    case 2:about_menu_over();break;
    case 3:service_menu_over();break;
    case 4:news_menu_over();break;
    case 5:career_menu_over();break;
    case 6:contact_menu_over();break;
  }
}

function sub_menu_out() {
  switch (menu)
  {
    case 1:home_menu_out();break;
    case 2:about_menu_out();break;
    case 3:service_menu_out();break;
    case 4:news_menu_out();break;
    case 5:career_menu_out();break;
    case 6:contact_menu_out();break;
  }
}

function all_menu_out()
{
  home_menu_collapse();
  about_menu_collapse();
  service_menu_collapse();
  news_menu_collapse();
  career_menu_collapse();
  contact_menu_collapse();
}
function contact_menu_over() {

  //set menu
  menu = 6;
  all_menu_out();
  contact_menu_expand();
}
function contact_menu_out() {
  contact_menu_collapse();
}
function home_menu_over() {

  //set menu
  menu = 1;
  all_menu_out();
  home_menu_expand();
}
function home_menu_out() {
  home_menu_collapse();
}
function about_menu_over() {

  //set menu
  menu = 2;
  all_menu_out();
  about_menu_expand();
}
function about_menu_out() {
  about_menu_collapse();
}

function service_menu_over() {
  //set menu
  menu = 3;
  all_menu_out();
  service_menu_expand();
}
function service_menu_out() {
  service_menu_collapse();
}

function news_menu_over() {
  //set menu
  menu = 4;
  all_menu_out();
  news_menu_expand();
}

function news_menu_out() {
  news_menu_collapse();
}

function career_menu_over() {

  //set menu
  menu = 5;
  all_menu_out();
  career_menu_expand();
}

function career_menu_out() {
  career_menu_collapse();
}

function contact_menu_collapse() {
  var el = "";

  set_image_menu("none");
  MM_swapImgRestore();

  el = document.getElementById("contact_menu");
  el.className = "menu";


}
function contact_menu_expand() {
  var el = "";

  set_image_menu("none");
  MM_swapImage('image_contact','','images/top_menu_o.jpg',1);

  el = document.getElementById("contact_menu");
  el.className = "menu_link";
}
function home_menu_collapse() {
  var el = "";

  set_image_menu("none");
  MM_swapImgRestore();

  el = document.getElementById("home_menu");
  el.className = "menu";
}
function home_menu_expand() {
  var el = "";

  set_image_menu("none");
  MM_swapImage('image_home','','images/top_menu_o.jpg',1);

  el = document.getElementById("home_menu");
  el.className = "menu_link";
}
function about_menu_collapse() {
  var el = "";

  set_image_menu("none");
  MM_swapImgRestore();

  el = document.getElementById("about_menu");
  el.className = "menu";

  el = document.getElementById("about_why_menu");
  el.style.display = "none";

  el = document.getElementById("about_location_menu");
  el.style.display = "none";

  el = document.getElementById("about_core_menu");
  el.style.display = "none";

  el = document.getElementById("about_management_menu");
  el.style.display = "none";
}


function about_menu_expand() {
  var el = "";

  set_image_menu("block");
  MM_swapImage('image_about','','images/top_menu_o.jpg',1);

  el = document.getElementById("about_menu");
  el.className = "menu_link";

  el = document.getElementById("about_why_menu");
  el.style.display = "block";

  el = document.getElementById("about_location_menu");
  el.style.display = "block";

  el = document.getElementById("about_core_menu");
  el.style.display = "block";

  el = document.getElementById("about_management_menu");
  el.style.display = "block";
}

function service_menu_collapse() {
    var el = "";

  set_image_menu("none");
  MM_swapImgRestore();

  el = document.getElementById("service_menu");
  el.className = "menu";

  el = document.getElementById("service_fa_menu");
  el.style.display = "none";

  el = document.getElementById("service_ict_menu");
  el.style.display = "none";

  el = document.getElementById("service_sqa_menu");
  el.style.display = "none";

  el = document.getElementById("service_ebs_menu");
  el.style.display = "none";
}

function service_menu_expand() {
    var el = "";

  set_image_menu("block");
  MM_swapImage('image_services','','images/top_menu_o.jpg',1);

  el = document.getElementById("service_menu");
  el.className = "menu_link";

  el = document.getElementById("service_fa_menu");
  el.style.display = "block";

  el = document.getElementById("service_ict_menu");
  el.style.display = "block";

  el = document.getElementById("service_sqa_menu");
  el.style.display = "block";

  el = document.getElementById("service_ebs_menu");
  el.style.display = "block";
}

function news_menu_collapse() {
  var el = "";

  set_image_menu("none");
  MM_swapImgRestore();

  el = document.getElementById("news_menu");
  el.className = "menu";

  el = document.getElementById("news_gcs_menu");
  el.style.display = "none";
 // el = document.getElementById("news_head_menu");
 // el.style.display = "none";

  //el = document.getElementById("news_press_menu");
  //el.style.display = "none";

 // el = document.getElementById("news_image_menu");
  //el.style.display = "none";

  //el = document.getElementById("news_up_menu");
  //el.style.display = "none";
  el = document.getElementById("news_vietnam_menu");
  el.style.display = "none";

}

function news_menu_expand() {
  var el = "";

  set_image_menu("block");
  MM_swapImage('image_news','','images/top_menu_o.jpg',1);

  el = document.getElementById("image_menu1");
  el.style.display = "none";

  el = document.getElementById("image_menu3");
  el.style.display = "none";

  el = document.getElementById("news_menu");
  el.className = "menu_link";

  el = document.getElementById("news_gcs_menu");
  el.style.display = "block";
 // el = document.getElementById("news_head_menu");
 // el.style.display = "block";

  //el = document.getElementById("news_press_menu");
  //el.style.display = "block";

  //el = document.getElementById("news_image_menu");
 // el.style.display = "block";

  //el = document.getElementById("news_up_menu");
  //el.style.display = "block";

  el = document.getElementById("news_vietnam_menu");
  el.style.display = "block";
}

function career_menu_collapse() {
  var el = "";

  set_image_menu("none");
  MM_swapImgRestore();

  el = document.getElementById("career_menu");
  el.className = "menu";


  el = document.getElementById("gcs_place_for_you");
  el.style.display = "none";

  el = document.getElementById("career_job_menu");
  el.style.display = "none";

  //el = document.getElementById("career_work_menu");
  //el.style.display = "none";
  el = document.getElementById("internships_menu");
  el.style.display = "none";

  el = document.getElementById("career_apply_menu");
  el.style.display = "none";
}

function career_menu_expand() {
  var el = "";

  set_image_menu("block");
  MM_swapImage('image_career','','images/top_menu_o.jpg',1);

  el = document.getElementById("career_menu");
  el.className = "menu_link";

 // el = document.getElementById("image_menu1");
 // el.style.display = "none";

  el = document.getElementById("gcs_place_for_you");
  el.style.display = "block";

  el = document.getElementById("career_job_menu");
  el.style.display = "block";

 // el = document.getElementById("career_work_menu");
  //el.style.display = "block";

  el = document.getElementById("internships_menu");
  el.style.display = "block";

  el = document.getElementById("career_apply_menu");
  el.style.display = "block";
}

function set_image_menu(value)
{
  el = document.getElementById("image_menu1");
  el.style.display = value;
  el = document.getElementById("image_menu2");
  el.style.display = value;
  el = document.getElementById("image_menu3");
  el.style.display = value;
}


function MM_swapImgRestore( /* chaunguyenm add */id, image_path ) { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
  
  image = document.getElementById( "img_next" );
	image.src = "../images/images_next.jpg";

	image = document.getElementById( "img_back" );
	image.src = "../images/images_back.jpg";
	
	
	
	if ( click_status == 1 )
	{
		image = document.getElementById( "img_pause" );
	  	image.src = "../images/images_stop.jpg";
	}
	else if ( click_status == 2 )
	{
		image = document.getElementById( "img_play" );
	  	image.src = "../images/images_play.jpg";
	}
	else if ( click_status == 0 )
	{
		image = document.getElementById( "img_pause" );
	  	image.src = "../images/images_stop.jpg";
	  	
	  	image = document.getElementById( "img_play" );
	  	image.src = "../images/images_play.jpg";
	}
	

  /*
  if ( id == "img_next" || id == "img_back" || click_status == 0)
  {  

	  image = document.getElementById( id );
	  image.src = image_path;
  }
  else if ( id == "img_play" )
  {  	  
  	  if ( click_status == 1 )
  	  {
  	  	image = document.getElementById( "img_pause" );
	  	image.src = "../images/images_stop.jpg";	  	
	  	
	  }
	  
	  else if ( click_status == 2 )
	  {
	  	image = document.getElementById( "img_play" );
	  	image.src = "../images/images_play.jpg";  
	  }
	  
	  image = document.getElementById( "img_next" );
	  image.src = "../images/images_next.jpg";
	  	
	  image = document.getElementById( "img_back" );
	  image.src = "../images/images_back.jpg";
  }
  else if ( id == "img_pause" )
  {
  	  if ( click_status == 2 )
  	  {
  	  	image = document.getElementById( "img_play" );
	  	image.src = "../images/images_play.jpg";
	  	
	  	image = document.getElementById( "img_next" );
	  	image.src = "../images/images_next.jpg";
	  	
	  	image = document.getElementById( "img_back" );
	  	image.src = "../images/images_back.jpg";
	  }
  }*/
  

}

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];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

// add new: function for event mouse hover on button next ( chaunguyenm )
function MM_mousehover_Image(id, image_path)
{	

	image = document.getElementById( id );
	image.src = image_path;
}