function blocks_resize() {

var currentTallest = 0,
     currentRowStart = 0,
     rowDivs = new Array(),
     $el,
     topPosition = 0;

 $('.product_list').each(function() {

   $el = $(this);
   topPostion = $el.position().top;

   if (currentRowStart != topPostion) {

     // we just came to a new row.  Set all the heights on the completed row
     for (currentDiv = 0 ; currentDiv < rowDivs.length ; currentDiv++) {
       rowDivs[currentDiv].height(currentTallest);
     }

     // set the variables for the new row
     rowDivs.length = 0; // empty the array
     currentRowStart = topPostion;
     currentTallest = $el.height();
     rowDivs.push($el);

   } else {

     // another div on the current row.  Add it to the list and check if it's taller
     rowDivs.push($el);
     currentTallest = (currentTallest < $el.height()) ? ($el.height()) : (currentTallest);

  }

  // do the last row
   for (currentDiv = 0 ; currentDiv < rowDivs.length ; currentDiv++) {
     rowDivs[currentDiv].height(currentTallest);
   }

 });

};

$(window).bind("resize", function(){
        blocks_resize();
});

$(document).ready(function(){              // по окончанию загрузки страницы
	     blocks_resize();

});