function swapImage( imgObj )
{
	var file_name = imgObj.src;
	var dot_position = 0;
	while( file_name.indexOf( ".", dot_position + 1 ) != -1 )
	{
		dot_position = file_name.indexOf( ".", dot_position + 1 );
	}
	if( file_name.indexOf( "_ro." ) == -1 )
	{
		imgObj.src = file_name.substring( 0, dot_position ) + "_ro" + file_name.substring( dot_position, file_name.length );
	} else {
		imgObj.src = file_name.substring( 0, dot_position - 3 ) + file_name.substring( dot_position, file_name.length );
	}
}

var ro_images = new Array('imgs/global_news_ro.gif', 'imgs/global_about_rentalweb_ro.gif', 'imgs/global_support_ro.gif', 'imgs/global_example_ro.gif', 'imgs/global_procedure_ro.gif', 'imgs/global_order_pamphlets_ro.gif', 'imgs/global_contact_us_ro.gif');
var obj_ro_images = new Array();
for( var i = 0, ilen = ro_images.length; i < ilen; i++ )
{
	obj_ro_images[i] = new Image();
	obj_ro_images[i].src = ro_images[i];
}