var t_id = setInterval(animate,20);
var pos=0;
var dir=2;
var len=0;

function animate(){
  var elem=document.getElementById('progress');
  if(elem!=null){
    if(pos==0)len += dir;
    if(len>32||pos>79)pos+=dir;
    if(pos>79)len-=dir;
    if(pos>79&&len==0)pos=0;
    elem.style.left=pos;
    elem.style.width=len;
  }
}

function remove_loading(){
  this.clearInterval(t_id);
  var targelem=document.getElementById('loader_container');
  targelem.style.display='none';
  targelem.style.visibility='hidden';
  var t_id=setInterval(animate,60);
}

var offsetfrommouse=[15,25]; //image x,y offsets from cursor position in pixels. Enter 0,0 for no offset
var displayduration=0; //duration in seconds image should remain visible. 0 for always.
var defaultimageheight = 40;  // maximum image size.
var defaultimagewidth = 40;  // maximum image size.
var timer;

function gettrailobj(){if(document.getElementById)return document.getElementById("preview_div").style;}
function gettrailobjnostyle(){if(document.getElementById)return document.getElementById("preview_div");}
function truebody(){return(!window.opera && document.compatMode && document.compatMode!="BackCompat")?document.documentElement:document.body;}

function hidetrail(){  
  gettrailobj().display="none";
  document.onmousemove="";
  gettrailobj().left="-500px";
  clearTimeout(timer);
}

function showtrail(imagename,title,width,height){
  i=imagename;t=title;w=width;h=height;
  timer=setTimeout("show('"+i+"',t,w,h);",200);
}

function show(imagename,title,width,height){
  var docwidth=document.all? truebody().scrollLeft+truebody().clientWidth : pageXOffset+window.innerWidth - offsetfrommouse[0];
  var docheight=document.all? Math.min(truebody().scrollHeight, truebody().clientHeight) : Math.min(window.innerHeight);
  if( (navigator.userAgent.indexOf("Konqueror")==-1  || navigator.userAgent.indexOf("Firefox")!=-1 || (navigator.userAgent.indexOf("Opera")==-1 && navigator.appVersion.indexOf("MSIE")!=-1)) && (docwidth>650 && docheight>500)) {
    ( width == 0 ) ? width = defaultimagewidth: '';
    ( height == 0 ) ? height = defaultimageheight: '';
    width+=30;
    height+=55;
    defaultimageheight=height;
    defaultimagewidth=width;
    document.onmousemove=followmouse; 
    newHTML = '<div class="border_preview" style="width:'+  width +'px;height:'+ height +'px"><div id="loader_container"><div id="loader"><div align="center">Carregando imagem</div><div id="loader_bg"><div id=progress> </div></div></div></div>';
    newHTML = newHTML + '<h2 class="title_h2">' + ' '+title + '</h2>'
    newHTML = newHTML + '<div class="preview_temp_load"><img onload="javascript:remove_loading();" src="' + imagename + '" border="0"></div>';
    newHTML = newHTML + '</div>'; 
    if(navigator.userAgent.indexOf("MSIE")!=-1 && navigator.userAgent.indexOf("Opera")==-1 ){
      newHTML = newHTML+'<iframe src="about:blank" scrolling="no" frameborder="0" width="'+width+'" height="'+height+'"></iframe>';
    }    
    gettrailobjnostyle().innerHTML=newHTML;
    gettrailobj().display="block";
  }
}

function followmouse(e){
  var xcoord=offsetfrommouse[0];
  var ycoord=offsetfrommouse[1];
  var docwidth=document.all? truebody().scrollLeft+truebody().clientWidth : pageXOffset+window.innerWidth-15;
  var docheight=document.all? Math.min(truebody().scrollHeight, truebody().clientHeight) : Math.min(window.innerHeight);
  if (typeof e != "undefined"){
    if (docwidth - e.pageX < defaultimagewidth + 2*offsetfrommouse[0]){
      xcoord = e.pageX - xcoord - defaultimagewidth; // Move to the left side of the cursor
    } else {
      xcoord += e.pageX;
    }
    if (docheight - e.pageY < defaultimageheight + 2*offsetfrommouse[1]){
      ycoord += e.pageY - Math.max(0,(2*offsetfrommouse[1] + defaultimageheight + e.pageY - docheight - truebody().scrollTop));
    } else {
      ycoord += e.pageY;
    }
  } else if (typeof window.event != "undefined"){
    if (docwidth - event.clientX < defaultimagewidth + 2*offsetfrommouse[0]){
      xcoord = event.clientX + truebody().scrollLeft - xcoord - defaultimagewidth; // Move to the left side of the cursor
    } else {
      xcoord += truebody().scrollLeft+event.clientX
    }
    if (docheight - event.clientY < (defaultimageheight + 2*offsetfrommouse[1])){
      ycoord += event.clientY + truebody().scrollTop - Math.max(0,(2*offsetfrommouse[1] + defaultimageheight + event.clientY - docheight));
    } else {
      ycoord += truebody().scrollTop + event.clientY;
    }
  }
  gettrailobj().left=xcoord+"px";
  gettrailobj().top=ycoord+"px";
}
function MostraQR(res1,res2){
  document.write("<a style=cursor:hand href=#><img onmouseover=showtrail('http://chart.apis.google.com/chart?chs="+res2+"x"+res2+"&cht=qr&choe=ISO-8859-1&chld=L|0&chl="+escape(document.location.href)+"','Endereço&nbsp;desta&nbsp;página',"+res2+","+res2+") style=border-left-color:#777777;border-bottom-color:#777777;border-top-color:#777777;border-right-color:#777777 onmouseout=hidetrail() src=http://chart.apis.google.com/chart?chs="+res1+"x"+res1+"&cht=qr&choe=ISO-8859-1&chld=H|0&chl="+escape(document.location.href+"&qr=+++++++++++++++1")+" border=0 width="+res1+" height="+res1+"></a><div id=preview_div style=display:none;z-index:200;position:absolute></div><div style=left:0px;visibility:hidden;position:absolute;top:0px></div>");
}