//

// showHideLayers

//

// copy this into the button to show/hide layer

// onClick="showHideLayers('layerName','','hide')"

// onClick="showHideLayers('layerName','','show')"

//

function showHideLayers() { 

  var i,p,v,obj,args=showHideLayers.arguments;

  for (i=0; i<(args.length-2); i+=3) 

  with (document) if (getElementById && ((obj=getElementById(args[i]))!=null)) { v=args[i+2];

    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }

    obj.visibility=v; }

}



function showHide(elementid){

	if (document.getElementById(elementid).style.visibility == 'hidden'){

		document.getElementById(elementid).style.visibility = 'visible';

	} else {

	document.getElementById(elementid).style.visibility = 'hidden';}

	

	if (document.getElementById(elementid).style.visibility == 'visible'){

		document.getElementById(elementid).style.visibility = 'hidden';

	} else {

	document.getElementById(elementid).style.visibility = 'visible';}

}





// Fazer aparecer uma div e desaparecer as outras todas

function showHideLetra(Id){

var theArray= new Array('letra_a_down','letra_b_down','letra_c_down','letra_d_down','letra_e_down','letra_f_down','letra_g_down','letra_h_down','letra_i_down','letra_j_down','letra_k_down','letra_l_down','letra_m_down','letra_n_down','letra_o_down','letra_p_down','letra_q_down','letra_r_down','letra_s_down','letra_t_down','letra_u_down','letra_v_down','letra_w_down','letra_x_down','letra_y_down','letra_z_down');

w=document.getElementById(Id)

if(w.style.visibility=="visible"){w.style.visibility='hidden';}else{



       for(i=0; i<theArray.length; i++){

            if(theArray[i] == Id){

                w.style.visibility='visible';

            }else{

                document.getElementById(theArray[i]).style.visibility='hidden';

            }

      }

      }

      

}







// Paguina da Info

function info1() { 

showHideLayers('tab01','','show'),showHideLayers('tab02','','hide'),showHideLayers('tab03','','hide'),showHideLayers('tab04','','hide'),

showHideLayers('div_inf01','','show'),showHideLayers('div_inf02','','hide'),showHideLayers('div_inf03','','hide'),showHideLayers('div_inf04','','hide')

}



function info2() { 

showHideLayers('tab01','','hide'),showHideLayers('tab02','','show'),showHideLayers('tab03','','hide'),showHideLayers('tab04','','hide'),

showHideLayers('div_inf01','','hide'),showHideLayers('div_inf02','','show'),showHideLayers('div_inf03','','hide'),showHideLayers('div_inf04','','hide')

}



function info3() { 

showHideLayers('tab01','','hide'),showHideLayers('tab02','','hide'),showHideLayers('tab03','','show'),showHideLayers('tab04','','hide'),

showHideLayers('div_inf01','','hide'),showHideLayers('div_inf02','','hide'),showHideLayers('div_inf03','','show'),showHideLayers('div_inf04','','hide')

}



function info4() { 

showHideLayers('tab01','','hide'),showHideLayers('tab02','','hide'),showHideLayers('tab03','','hide'),showHideLayers('tab04','','show'),

showHideLayers('div_inf01','','hide'),showHideLayers('div_inf02','','hide'),showHideLayers('div_inf03','','hide'),showHideLayers('div_inf04','','show')

}





// Paguina dos links

function link1() { 

showHideLayers('tab02','','show'),showHideLayers('tab01','','hide'),showHideLayers('link_uteis','','show'),showHideLayers('link_media','','hide')

}



function link2() { 

showHideLayers('tab01','','show'),showHideLayers('tab02','','hide'),showHideLayers('link_media','','show'),showHideLayers('link_uteis','','hide')

}




<!-- Escolher uma imagem aleatoriamente -->
var theImages = new Array()

theImages[0] = 'images/s_foto_01.jpg'
theImages[1] = 'images/s_foto_02.jpg'
theImages[2] = 'images/s_foto_06.jpg'
theImages[3] = 'images/s_foto_07.jpg'
theImages[4] = 'images/s_foto_08.jpg'
theImages[5] = 'images/s_foto_09.jpg'
theImages[6] = 'images/s_foto_10.jpg'
theImages[7] = 'images/s_foto_11.jpg'
theImages[8] = 'images/s_foto_12.jpg'
theImages[9] = 'images/s_foto_13.jpg'
theImages[10] = 'images/s_foto_15.jpg' 

var j = 0
var p = theImages.length;
var preBuffer = new Array()
for (i = 0; i < p; i++){
   preBuffer[i] = new Image()
   preBuffer[i].src = theImages[i]
}
var whichImage = null
function checkNumber(number){
	if(whichImage!=number){
		return number
	} else {
		var newNumber = Math.round(Math.random()*(p-1));		
		return newNumber
	}
	
}
function showimag(){
	var newNumber = Math.round(Math.random()*(p-1));
	var check = checkNumber(newNumber)
	whichImage = check
document.write('<img src="'+theImages[whichImage]+'">');
}