function setFontSize(acao, fator){
  var zoom = readCookie("zoom");
    if (isNaN(zoom) || zoom == '' || zoom == null) {
	  zoom = 1;
	} 
	if (isNaN(fator)) {
	  fator = 0;
	} 
    //alert('acao = [' + acao + ']');
    //alert('zoom = [' + zoom + ']');
    //alert('fator = [' + fator + ']');

//} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
	//windowWidth = document.documentElement.clientWidth;
	//windowHeight = document.documentElement.clientHeight;
//} else if (document.body) { // other Explorers
	//windowWidth = document.body.clientWidth;
	//windowHeight = document.body.clientHeight;
//}
  if (acao == "+") {
    zoom = parseFloat(zoom) + parseFloat(fator);
	}
  if (acao == "-") {
    zoom = parseFloat(zoom) - parseFloat(fator);
	}
	
  window.parent.document.documentElement.style.zoom = parseFloat(zoom);
  createCookie("zoom", zoom, 365);	

//  window.parent.document.body.style.zoom = parseFloat(zoom);
//  window.style.zoom = parseFloat(zoom);  
//    
//if (document.documentElement) {	
//  window.parent.document.documentElement.style.zoom = parseFloat(zoom);
//  createCookie("zoom", zoom, 365);
//}
//else {
//	alert('Seu browser não permite ajuste dinâmico do Zoom. Utilize o teclado ( ctrl + ou ctrl -');
//}
  
}

function setActiveStyleSheet(title) {
  var i, a, main;
  if (title == "" || title == null) {
    title = "normal";
  }
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") > 0 && a.getAttribute("title")) {
	  a.disabled = true;
      if(a.getAttribute("title") == title) {
	  a.disabled = false;
	  }
    }
  }
}
function getActiveStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") > 0 && a.getAttribute("title") && !a.disabled) {
	return a.getAttribute("title");
	}
  }
  return null;
}

function getPreferredStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1
       && a.getAttribute("rel").indexOf("alt") == -1
       && a.getAttribute("title")
       ) return a.getAttribute("title");
  }
  return null;
}

function createCookie(name,value,days) {
  if (days) {
    var date = new Date();
    date.setTime(date.getTime()+(days*24*60*60*1000));
    var expires = "; expires="+date.toGMTString();
  }
  else expires = "";
  document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
  var nameEQ = name + "=";
  var ca = document.cookie.split(';');
  for(var i=0;i < ca.length;i++) {
    var c = ca[i];
    while (c.charAt(0)==' ') c = c.substring(1,c.length);
    if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
  }
  return null;
}