function randomphoto() {

var a = 1;
        var victor = [];
	 victor[0] = "nrpsjgvydk";
        victor[1] = "fw8y2txv5z";
        victor[2] = "9wg1mhpnsx";
        victor[3] = "thsbdf4863";
        victor[4] = "k3yh64w8t0";
        victor[5] = "0qy4ct3gf9";
        victor[6] = "ny7x6q93fz";
        victor[7] = "rjqywfnc42";
        victor[8] = "t3p4vzk29y";
        victor[9] = "m4g56h3krq";
        victor[10] = "c8bfv00hrj";
        victor[11] = "21mzrfs39g";
        victor[12] = "g4t5wkpxyj";
        victor[13] = "3nxw007sqf";
        victor[15] = "p7bz2609rm";
        victor[16] = "z0dqcrx3bj";
		var num_old = num;

        var num = generate_random (16);

        myclick(victor[num]);
		}
		
function togle_enviar_email()
{

        if (document.getElementById('span-email').style.display=="none")
        {
                document.getElementById('span-email').style.display="block";
        }
        else
        {
                document.getElementById('span-email').style.display="none";
        }
}

function charactar(idtextarea, iddiv, max)
{
//idtextarea > id del text area
//iddiv > id del div con el nro.

var cant = 0;
var cant = document.getElementById(idtextarea).value.length;
var restan = max - cant;

document.getElementById(iddiv).innerHTML = restan;

        if (restan < 0)
        {
        document.getElementById(iddiv).innerHTML = "LIMITE SUPERADO";
        //alert ('Se ha excedido, por favor recorte el texto.');
        }


}

function generate_random (max)
{
        var ran_unrounded=Math.random()*max;
        var ran_number=Math.floor(ran_unrounded);

        return ran_number;
}




function show(boxid){
   document.getElementById(boxid).style.visibility="visible";
   document.getElementById(boxid).style.display="block";
}

function hide(boxid){
   document.getElementById(boxid).style.visibility="hidden";
   document.getElementById(boxid).style.display="none";

}

function gotorio()
{
        valor = document.getElementById('combo-rios').value;

        myclick(valor);
        valor = document.getElementById('combo-rios').selectedIndex = 0;
}

function riosmostrar()
{
        var estado = document.getElementById('checkbox-rios').checked
        //alert (estado);
        if (estado == true)
        {
        load ('data_rios.xml');
        setTimeout ("document.getElementById('combo-rios').disabled = false;", 1000);
        }
        else
        {
        document.getElementById('combo-rios').disabled = 'disabled';
        map.removeOverlay(gmarkers['r1']);
        map.removeOverlay(gmarkers['r2']);
        map.removeOverlay(gmarkers['r3']);
        map.removeOverlay(gmarkers['r4']);
        map.removeOverlay(gmarkers['r5']);
        map.removeOverlay(gmarkers['r6']);
        map.removeOverlay(gmarkers['r7']);
        map.removeOverlay(gmarkers['r8']);
        map.removeOverlay(gmarkers['r9']);
        map.removeOverlay(gmarkers['r10']);
        map.removeOverlay(gmarkers['r11']);
        map.removeOverlay(gmarkers['r12']);
        map.removeOverlay(gmarkers['r13']);
        map.removeOverlay(gmarkers['r14']);
        map.removeOverlay(gmarkers['r15']);
        map.removeOverlay(gmarkers['r16']);
        map.removeOverlay(gmarkers['r17']);
        map.removeOverlay(gmarkers['r18']);
        map.removeOverlay(gmarkers['r19']);
        map.removeOverlay(gmarkers['r20']);
        map.removeOverlay(gmarkers['r21']);
        map.removeOverlay(gmarkers['r22']);
        }
}