var a=Math.round(Math.random()*2) 
image = new Array(); 
image[0]="../bn_01.gif" 
image[1]="../bn_02.gif" 
image[2]="../bn_03.gif" 
document.write ("<a href='http://santehnika.com.ua'/>");
document.write ("<img src="+image[a]+" alt='SANTEHNIKA.COM.UA' width='468' height='60' hspace='1' vspace='1' border='0'>");
document.write ("</a>");