function aleatorio(inferior,superior){
    numPossibilidades = superior - inferior
    aleat = Math.random() * numPossibilidades
    aleat = Math.floor(aleat)
    return parseInt(inferior) + aleat
} 

if (!agpag)
{	var agpag='home'; 	}

stepcarousel.setup({
	galleryid: 'mygallery', //id of carousel DIV
	beltclass: 'belt', //class of inner "belt" DIV containing all the panel DIVs
	panelclass: 'panel', //class of panel DIVs each holding content
	autostep: {enable:false, moveby:1, pause:3000},
	panelbehavior: {speed:500, wraparound:true, persist:false},
	defaultbuttons: {enable: false, moveby: 1, leftnav: ['http://i34.tinypic.com/317e0s5.gif', -5, 80], rightnav: ['http://i38.tinypic.com/33o7di8.gif', -20, 80]},
	statusvars: ['statusA', 'statusB', 'statusC'], //register 3 variables that contain current panel (start), current panel (last), and total panels
	contenttype: ["ajax", "agenda_boxes.php?pag="+agpag], //content setting ['inline'] or ['external', 'path_to_external_file']
	oninit:function(){
	stepcarousel.stepBy('mygallery', aleatorio(1,statusC))
}
})