var divPrefix = "<div id='slideItem' style='left:";
  var leftPos = 0;
  var imgPrefix = "px;'><img src='";
  var divSuffix = "' width='551' height='346' border='0'></div>";
  for (i=0;i<slides.length;i++) {
   var fullSlide = divPrefix + leftPos + imgPrefix + slides[i] + divSuffix;
   document.write(fullSlide);
   leftPos+=551; 
  }