function send_ranking( _elem, _id, _key )
{
	var _ranking = _elem.value;
	
	new Ajax.Request( "submit_ranking.php", {
		method: "get",
		parameters: {
			id:_id,
			confirm:_key,
			ranking:_ranking
		}
	} );		
}

function hover_on( _elem )
{
	if( !_elem.hasClassName( "btn_hover" ) )
		_elem.addClassName( "btn_hover" );	
}

function hover_off( _elem )
{
	if( _elem.hasClassName( "btn_hover" ) )
		_elem.removeClassName( "btn_hover" );
}

Event.observe( "btn_home", "mouseover", function() {
	hover_on( $("btn_home") );
} );

Event.observe( "btn_home", "mouseout", function() {
	hover_off( $("btn_home") );
} );

Event.observe( "btn_price", "mouseover", function() {
	hover_on( $("btn_price") );
} );

Event.observe( "btn_price", "mouseout", function() {
	hover_off( $("btn_price") );
} );


Event.observe( "btn_reports", "mouseover", function() {
	hover_on( $("btn_reports") );
} );

Event.observe( "btn_reports", "mouseout", function() {
	hover_off( $("btn_reports") );
} );

if( $("btn_orders") != undefined )
{
	Event.observe( "btn_orders", "mouseover", function() {
		hover_on( $("btn_orders") );
	} );

	Event.observe( "btn_orders", "mouseout", function() {
		hover_off( $("btn_orders") );
	} );
}