var images = new Object;

function Preload_Image(_path) {

    if ( document.images ) {

        var _file; var _name; var _x;

        _x = _path.lastIndexOf("/");

        if ( (_x > -1) && (_x < _path.length) ) {

            _file = _path.substring(_x + 1, _path.length);

        } else {

            _file = _path;

        }


        _x = _file.lastIndexOf(".");

        if ( (_x > -1) && (_x < _file.length) ) {

            _name = _file.substring(0, _x);

        } else {

            _name = _file;

        }

        var _offset = images.length;

        images[ _name ] = new Image;
        images[ _name ].src = _path;

        return( _name );

    }

}


function Preload_Images() {

    if ( document.images ) {

        for (var _i = 0; _i < arguments.length; _i++) {
        
            Preload_Image(arguments[_i]);
         
        }

    }

}

function Change_Image(_img_name, _obj_name, _text) {

    if ( document.images ) {

        document.images[ _img_name ].src = images[ _obj_name ].src;

    }
    
    if ( _text != null ) {
    
        window.status = _text;
        
    } else {
    
        window.status = '';
        
    }

}

function Hide_Div(_div_name) {

  var _div = document.getElementById(_div_name);
  
  if ( _div != null ) {
    _div.style.display = "none";
  }

}

function Show_Div(_div_id) {

  var _div = document.getElementById(_div_id);
  
  if ( _div != null ) {
    _div.style.display = "block";  
  }

}

function Set_Opacity(_elem_id, _amount) {
	
  var _elem = document.getElementById(_elem_id);
  
  if ( _elem != null ) {
    _elem.style.opacity = _amount;
    _elem.style.filter = 'alpha(opacity=' + _amount*100 + ')';
  }	
}