/* preload images */
 a1=new Image;a1.src="menu_about-en.gif";    a11=new Image;a11.src="menu_about-en_ov.gif"; 
 a2=new Image;a2.src="menu_about-ru.gif";    a12=new Image;a12.src="menu_about-ru_ov.gif"; 
 a3=new Image;a3.src="menu_cust-en.gif";    a13=new Image;a13.src="menu_cust-en_ov.gif"; 
 a4=new Image;a4.src="menu_postav-ru.gif";  a14=new Image;a14.src="menu_postav-ru_ov.gif"; 

/* rollover images */
function chPic(img,ref){ document.images[img].src = ref; } 

/* anti-spam mailing */
function writeMail (login, serv, subj, addons)
{
if (!subj) subj='from site';
var string='<a href="mailto:'+login+'@'+serv+'?subject='+subj+'" '+addons+'>'+login+'@'+serv+'</a>';
document.write (string);
}