var currentFontSize = 9;
function changeFontSize(sizeDifference) {
	currentFontSize = parseInt(currentFontSize) + parseInt(sizeDifference);
	if(currentFontSize > 16) {
		return;
	} else if(currentFontSize < 8) {
		return;
	}
	setFontSize(currentFontSize);
}

function setFontSize(fontSize) {
	var stObj = document.getElementById('content');
	var arr = getElementsByClassName(stObj, 'sub', 'par', 'cit', 'textos', fontSize);
}

function getElementsByClassName(node, classname, classname2, classname3, classname4, fontSize) {
    var re  = new RegExp('\\b' + classname  + '\\b');
    var re2 = new RegExp('\\b' + classname2 + '\\b');
    var re3 = new RegExp('\\b' + classname3 + '\\b');
    var re4 = new RegExp('\\b' + classname4 + '\\b');
    var els = node.getElementsByTagName("*");
	node.style.fontSize = fontSize + 'px';
    for(var i=0,j=els.length; i<j; i++) {
        if(re.test (els[i].className) || re2.test(els[i].className) || re3.test(els[i].className) || re4.test(els[i].className)) {
			els[i].style.fontSize = fontSize + 'px';
		}
	}
}

function contaEnquete() {
	var form = document.enquete;
	var resp = form.respostas;
	for(i = 0; i < resp.length; i++) {
		if(resp[i].checked) {
			window.open("conta_enquete.php?resp="+resp[i].value, "Enquete", "status=no,toolbar=no,resizable=no,menubar=no");
			return;
		}
	}
	alert('Você deve selecionar uma resposta.');
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function texto_submit() {
	return true;
}