function maak_button(){
	$("._button").addClass("ui-state-default");
	$("._button").addClass("ui-corner-all");
	$("._button:not(.ui-state-disabled)").hover(function(){ 
			$(this).addClass("ui-state-hover"); 
		},function(){ 
			$(this).removeClass("ui-state-hover"); 
		}).mousedown(function(){
			$(this).parents('._buttonset-single:first').find("._button.ui-state-active").removeClass("ui-state-active");
			if( $(this).is('.ui-state-active._button-toggleable, ._buttonset-multi .ui-state-active') ){ $(this).removeClass("ui-state-active"); }
			else { $(this).addClass("ui-state-active"); }	
	}).mouseup(function(){
		if(! $(this).is('._button-toggleable, ._buttonset-single .fg-button,  ._buttonset-multi .button') ){
			$(this).removeClass("ui-state-active");
		}
	});
}