window.addEvent('domready', function() {
   take_categories = function (id) {
      var categories = $$('#formCategories ul li input');
      var str = "";
		var category_count = 0;
      categories.each( function(category, i) {
         if (category.checked == true) {
            str += category.name+"="+category.value+"|";
				category_count++;
         }else{
            str += category.name+"="+0+"|";
         }
      });
		if ( category_count > 0 ) {
        var str_len = str.length;
        $(id).value = str.slice(0,str_len-1);
		}
   }
});