function MultiSelector( list_target, max ){
      this.list_target = list_target;
      this.count = 0;this.id = 0;
      if( max ){
            this.max = max;
      } else {
            this.max = -1;
      };
      this.addElement = function( element ){
            if( element.tagName == 'INPUT' && element.type == 'file' ){
                  element.name = 'photo[]';
                  element.multi_selector = this;
                  element.onchange = function(){
                        var new_element = document.createElement( 'input' );
                        new_element.type = 'file';
                        this.parentNode.insertBefore( new_element, this );
                        this.multi_selector.addElement( new_element );
                        this.multi_selector.addListRow( this );
                        this.style.position = 'absolute';
                        this.style.left = '-1000px';
                  };
                  if( this.max != -1 && this.count >= this.max ){
                        element.disabled = true;
                  };
                  this.count++;this.current_element = element;
            } else {
                  alert( 'Error: not a file input element' );
            };
      };
      this.addListRow = function( element ){
            var new_row = document.createElement( 'div' );
            var new_row_button = document.createElement( 'input' );
            new_row_button.type = 'button';
            new_row_button.value = '-';
            new_row.element = element;
            new_row_button.onclick= function(){
                  this.parentNode.element.parentNode.removeChild( this.parentNode.element );
                  this.parentNode.parentNode.removeChild( this.parentNode );
                  this.parentNode.element.multi_selector.count--;
                  this.parentNode.element.multi_selector.current_element.disabled = false;
                  return false;
            };
            new_row.innerHTML = element.value;new_row.appendChild( new_row_button );
            this.list_target.appendChild( new_row );
      };
};