//Specify affected tags. Add or remove from list:

var tgs = new Array( 'div');



//Specify spectrum of different font sizes:

var szs = new Array( 'xx-small','x-small','small','large','x-large','xx-large' );

var startSz = 2;

function nova_janela(obj) {

   if (obj.value!='0'){

      window.open(obj.value);

   }

}



function ts( trgt,inc ) {

if (!document.getElementById) return

var d = document,cEl = null,sz = startSz,i,j,cTags;

sz += inc;

if ( sz < 0 ) sz = 0;

if ( sz > 5 ) sz = 5;

startSz = sz;

if ( !( cEl = d.getElementById( trgt ) ) ) cEl = d.getElementsByTagName( trgt )[ 0 ];



cEl.style.fontSize = szs[ sz ];



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

cTags = cEl.getElementsByTagName( tgs[ i ] );

for ( j = 0; j < cTags.length; j++ ) cTags[ j ].style.fontSize = szs[ sz ];

}

}



var imgatual=0;

var basea="";

	var img = new Array();

	img[0] = "img0.png";

	img[1] = "img1.png";

	img[2] = "img2.png";

	img[3] = "img3.png";



function nextImage() {

	imgatual++;

	if(imgatual == 3) imgatual=0;

	document.getElementById("rand").innerHTML='<img id="imgtopo" style="margin-top: 3px;margin-right: 5px; opacity:0;" src="'+basea+'/'+img[imgatual]+'" />';

	fadeIn('imgtopo',5); 

}



function imgRand(base) {

	basea = base;

	var a = Math.floor(Math.random()*4);

	document.getElementById("rand").innerHTML='<img id="imgtopo" style="margin-top: 3px;margin-right: 5px; opacity:0;" src="'+base+'/'+img[a]+'" />';

	fadeIn('imgtopo',5); 

}

function fadeOut(id, time) {

	target = id; //document.getElementById(id);

	alpha = 100;

	timer = (time*1000)/50;

	var i = setInterval(

			function() {

				if (alpha <= 0) {

					clearInterval(i);

					if((atual+1) >= img.length) atual=0;

					else atual++;

					fadeIn('alvo', time);

				}

				setAlpha(target, alpha);

				alpha -= 2;

			}, timer);

}



function fadeIn(id, time) {

	target = document.getElementById(id);

	setAlpha(target, 0);

	target.src = img[atual];

	target.style.width=largura+"px";

	target.style.height = altura + "px";

	target.style.visibility="visible";

//	alert(target.src + ' - ' + target.height + ' - ' + target.width);

	cap = document.getElementById("caption");

	cap.innerHTML = caption[atual];

	cap.style.width= largura+"px";

	alpha = 0;

	timer = (time*1000)/50;

	var i = setInterval(

			function() {

				if (alpha >= 100) {

					clearInterval(i);

					if(img.length==1) return 0;

					setTimeout(function() { fadeOut(target,time); },3000);

					//wait(target, time);

				}

				setAlpha(target, alpha);

				alpha += 2;

			}, timer);

}



function setAlpha(target, alpha) {

	target.style.filter = "alpha(opacity="+ alpha +")";

	target.style.opacity = alpha/100;

}