button=new Array("b0","b1","b1_1","b1_2","b1_3","b2","b2_1","b2_2","b2_3","b2_4","b2_5","b2_6","b2_7","b3","b3_1","b4","b5","b5_1","b5_2","b5_3","b5_4");
txt=new Array("Intro","Home","Sitemap","Impressum","Contact","Information","Programme Announcement","What is it","What happens and when","Who can participate","Which research areas are covered","Which other institutions are involved","Support","Background","History of EICOS","Reports","Member Section","Forum","Members","News","Links");
on_img=0;
on_txt="";
preload_complete=0;

button_lo=new Array(button.length);
button_hi=new Array(button.length);
roberto_blanco="img/pixel_clear.gif";

function on(img,txt)
{
   old_on_img=on_img;
   on_img=img;
   if (!txt) {txt=get_mo_txt(img);}
	on_txt=txt;
   if (old_on_img!="") {lo(old_on_img);}

   eval("document.images."+img+".src=button_hi['"+img+"'].src");
   window.status=on_txt;
}
function hi(img,txt)
{
   if((img!=on_img)&&(preload_complete))
   {
      clear_preload("button_hi",img);
      eval("lo_src=document.images."+img+".src");
      hi_src=lo_src.substring(0,lo_src.length-7)+"_hi.gif";

      eval("document.images."+img+".src='"+hi_src+"'");
      if (!txt) {txt=get_mo_txt(img);}
      window.status=txt;
   }
}
function lo(img)
{
   if((img!=on_img)&&(preload_complete))
   {
      eval("document.images."+img+".src=button_lo['"+img+"'].src");
      window.status=on_txt;
   }
}
function get_mo_txt(img)
{
	for (a=0; a<button.length; a++)
	{
		if (button[a]==img) {return txt[a];}
	}
	return "";
}
function preload()
{
   preload_img = new Array
   for(a=0; a<button.length; a++)
   {
      img=button[a];
      if (eval("document.images."+img))
      {
         // LO
         eval("lo_src=document.images."+img+".src");
         button_lo[button[a]]=new Image;
         button_lo[button[a]].src=lo_src;

         // HI
         hi_src=lo_src.substring(0,lo_src.length-7)+"_hi.gif";
         button_hi[button[a]]=new Image;
         button_hi[button[a]].src=hi_src;
      }
   }
   if (on_img) {on(on_img,on_txt);}
   preload_complete=1;
}
function clear_preload(img_obj,img_index)
{
   if ((eval("document.images."+img_index))&&(preload_complete))
   {
      if (eval("document.images."+img_index+".complete"))
      {
         eval(img_obj+"['"+img_index+"'].src='"+roberto_blanco+"'");
      }
   }
}
function pop_photo(img,txt)
{
	url="photopopup.php?img="+escape(img)+"&txt="+escape(txt);
	photopopup=window.open(url,"photopopup","width=450,height=350,scrollbars=no,resizable=yes,top=100,left=100");
	setTimeout("photopopup.focus()",250);
}