function openWindow( window_url, window_name, window_parameters )
{
	window.open( window_url, window_name, window_parameters);
}

function closeWindow()
{
	this.close();
}


function changeImage( image_name_in_img_tag, image_file_name )
{
	eval("document.images[image_name_in_img_tag].src = './img/links/' + image_file_name");
}