var sp_color_down = "rgb(152, 167, 191)";
var sp_color_over = "rgb(202, 203, 211)";



function sp_over( obj )
{
	if( obj.style.background.indexOf(sp_color_down) != 0 )
		obj.style.setProperty('background',sp_color_over,'');
}

function sp_out( obj )
{
	if( obj.style.background.indexOf(sp_color_over) == 0  )
		obj.style.removeProperty('background');

}

function sp_down( obj )
{
	if( obj.style.background.indexOf(sp_color_down) == 0 )
		obj.style.removeProperty('background');
	else
		obj.style.setProperty('background',sp_color_down,'');
}