//Create a boolean variable to check for a valid Internet Explorer instance.
var xmlhttp=false;

//Check if we are using IE.
try{
	//If the Javascript version is greater than 5.
	xmlhttp=new ActiveXObject("Msxml2.XMLHTTP");
}catch(e){
	//If not, then use the older active x object.
	try{
		//If we are using Internet Explorer.
		xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
	}catch(e){
		//Else we must be using a non-IE browser.
		xmlhttp=false;
	}
}

//If we are using a nonIE browser, create a javascript instance of the object.
if(!xmlhttp && typeof XMLHttpRequest != 'undefined'){
	xmlhttp=new XMLHttpRequest();
}

function makerequest(serverPage,objID){
	var obj = document.getElementById(objID);
	xmlhttp.open("GET",serverPage);
	xmlhttp.onreadystatechange=function(){
		if(xmlhttp.readyState==4 && xmlhttp.status==200){
			obj.innerHTML=xmlhttp.responseText;
		}
	}
	xmlhttp.send(null);
}

function showImageBox(id,width,gallery){
	document.getElementById("GalleryImageBox").style.display="block";
	document.getElementById("TransBackground").style.display="block";
	document.getElementById("GalleryImageBox").style.marginLeft="-"+(width/2)+"px";

	makerequest("functions/imagebox.php?id="+id+"&gallery="+gallery,"GalleryImageBox");
}

function closeImageBox(){
	document.getElementById("GalleryImageBox").style.display="none";
	document.getElementById("TransBackground").style.display="none";
	
	makerequest("","GalleryImageBox");
}

function showEditBox(id,gallery_id,page){
	document.getElementById("SiteEditBox").style.display="block";
	document.getElementById("TransBackground").style.display="block";
	
	makerequest("functions/edit.php?page="+page+"&id="+id+"&gallery_id="+gallery_id,"SiteEditBox");
}

function closeEditBox(){
	document.getElementById("SiteEditBox").style.display="none";
	document.getElementById("TransBackground").style.display="none";
	
	makerequest("","SiteEditBox");
}

function showUploadWindow(page,id){
	document.getElementById("UploadWindow").style.display="block";
	document.getElementById("TransBackground").style.zIndex="130";
	
	makerequest("functions/uploadform.php?page="+page+"&id="+id,"UploadWindow");
}

function closeUploadWindow(){
	document.getElementById("UploadWindow").style.display="none";
	document.getElementById("TransBackground").style.zIndex="50";
	
	makerequest("","UploadWindow");
}

function startUpload(){
      document.getElementById('f1_upload_process').style.visibility = 'visible';
      document.getElementById('f1_upload_form').style.visibility = 'hidden';
      return true;
}

function stopUpload(success){
      closeUploadWindow();
	  if(success==1)
	  	document.getElementById('file_msg').innerHTML = "Uppladdningen lyckades, glöm inte att spara!";
	  else
	  	document.getElementById('file_msg').innerHTML = "Uppladdningen misslyckades!"
      return true;   
}