function ajaxNow(_data, _data2, _data3, type)
{
  var xmlHttp;
  try
  {
    /* Firefox, Opera 8.0+, Safari */
    xmlHttp=new XMLHttpRequest();
  }
  catch (e)
  {
    /* newer IE */
    try
    {
      xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
    }
    catch (e)
    {
      /* older IE */
      try
      {
        xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
      }
      catch (e)
      {
        alert("Der er opstået en fejl, og nogle funktioner er muligvis deaktiveret. Denne fejl kan rettes, ved at opdatere din browser.");
        return false;
      }
    }
  }
  
  xmlHttp.onreadystatechange=function()
  {
    if(xmlHttp.readyState==4)
    {
	
	 if(type=="gallery"){
		 document.getElementById('galleria').innerHTML = xmlHttp.responseText;
  }else{		
	document.getElementById('event_content').innerHTML = xmlHttp.responseText;
  }
  
    }
  }
  
  var rand_no = Math.random();
  
  if(type=="gallery"){
	   xmlHttp.open("GET","gallery.php?nocache="+rand_no,true);
  xmlHttp.send(null);
  }else{
  
  document.getElementById('event_content').innerHTML = "<div align=\"center\"><font size='1' color='#808080' face='Tahoma'><br><br><br><br><br>Henter indhold ..</font></div>";
  
  xmlHttp.open("GET","get_event_content.php?nocache="+rand_no+"&id="+_data,true);
  xmlHttp.send(null);
  }
  
}


function changePage(pageChange){
cur_page = document.getElementById('cur_page').value;
document.getElementById('cur_page').value = parseInt(cur_page)+parseInt(pageChange);
cur_page = parseInt(cur_page)+parseInt(pageChange);

var img = document.getElementById('pic_'+cur_page).innerHTML;
document.getElementById('event_content_img').innerHTML = '<img border="0" src="event_avatar.php?img='+img+'">';

// PAGE CHANGE
total = document.getElementById('event_pages').value;

// LAST PAGE
if(cur_page == total && total > 1){
adjustRightArrow(false);
adjustLeftArrow(true);

// FIRST PAGE
}else if(cur_page == 1){
adjustLeftArrow(false);
if(total == 1){
adjustRightArrow(false);
}else{
adjustRightArrow(true);
};

}else if(cur_page != total && cur_page != 1){
adjustRightArrow(true);
adjustLeftArrow(true);
};

};

function adjustRightArrow(active){
	if(active){
	document.getElementById('arrow_right').innerHTML = '<a href="JavaScript: changePage(\'1\')"><img border="0" src="arrow_right_active.gif" id="arrow_right_img"></a>';	
	}else{
	document.getElementById('arrow_right').innerHTML = '<img border="0" src="arrow_right_inactive.gif" id="arrow_right_img">';	
	};
};

function adjustLeftArrow(active){
	if(active){
	document.getElementById('arrow_left').innerHTML = '<a href="JavaScript: changePage(\'-1\')"><img border="0" src="arrow_left_active.gif" id="arrow_left_img"></a>';	
	}else{
	document.getElementById('arrow_left').innerHTML = '<img border="0" src="arrow_left_inactive.gif" id="arrow_left_img">';
	};
};