function preload( name, prefix )
{

	eval( name + '_over = new Image()' )
	eval( name + '_over.src = "/imgs/' + prefix + name + '_on.gif"' );
	eval( name + '_out  = new Image()' )
	eval( name + '_out.src = "/imgs/' + prefix + name + '_off.gif"' );
}

function changeImage( name, suffix )
{
	document.images[name].src = eval( name + "_" + suffix + ".src" );
}

function mout( name )
{
	changeImage( name, "out" );
}

function mover( name )
{
	changeImage( name, "over" );
}