var xmlhttp;

function checkEmail(str) {
	xmlhttp=GetXmlHttpObject();
	if (xmlhttp==null) {
		alert ("Browser does not support HTTP Request");
		return;
	}
	
	var url="?mod=user&action=check_email";
	url=url+"&email="+removeSpaces(str);
	url=url+"&sid="+Math.random();
	xmlhttp.onreadystatechange = function(){};
	xmlhttp.open("GET",url,false);
	xmlhttp.send(null);
	
	return xmlhttp.responseText;
}

function checkCaptcha(str) {
	xmlhttp=GetXmlHttpObject();
	if (xmlhttp==null) {
		alert ("Browser does not support HTTP Request");
		return;
	}
	
	var url="?mod=user&action=check_captcha";
	url=url+"&code="+str;
	url=url+"&sid="+Math.random();
	xmlhttp.onreadystatechange = function(){};
	xmlhttp.open("GET",url,false);
	xmlhttp.send(null);
	
	return xmlhttp.responseText;
}

function checkPassword(str) {
	xmlhttp=GetXmlHttpObject();
	if (xmlhttp==null) {
		alert ("Browser does not support HTTP Request");
		return;
	}
	
	var url="?mod=user&action=check_password";
	url=url+"&pwd="+removeSpaces(str);
	url=url+"&sid="+Math.random();
	xmlhttp.onreadystatechange = function(){};
	xmlhttp.open("GET",url,false);
	xmlhttp.send(null);
	
	return xmlhttp.responseText;
}

function checkAccountSum(str) {
	xmlhttp=GetXmlHttpObject();
	if (xmlhttp==null) {
		alert ("Browser does not support HTTP Request");
		return;
	}
	
	var url="?mod=user&action=check_account_sum";
	url=url+"&sum="+removeSpaces(str);
	url=url+"&sid="+Math.random();
	xmlhttp.onreadystatechange = function(){};
	xmlhttp.open("GET",url,false);
	xmlhttp.send(null);
	
	return xmlhttp.responseText;
}

function loadSubCategories(cat) {
	if (cat.length > 0) {
		xmlhttp=GetXmlHttpObject();
		if (xmlhttp==null) {
			alert ("Browser does not support HTTP Request");
			return;
		}
		
		var url="?mod=advert&action=load_subcategories";
		url=url+"&cat="+cat;
		url=url+"&sid="+Math.random();
		xmlhttp.onreadystatechange = function() {
			subCategoriesLoaded();
		};
		xmlhttp.open("GET",url,true);
		xmlhttp.send(null);
	}
	else {
		document.getElementById('subCategories').style.display = 'none';
	}
}

function subCategoriesLoaded() {
	if (xmlhttp.readyState==4) {
		document.getElementById('subCategories').innerHTML=xmlhttp.responseText;
		document.getElementById('subCategories').style.display = 'block';
	}
}

function loadSubCategoriesForSearch(cat) {
	xmlhttp=GetXmlHttpObject();
	if (xmlhttp==null) {
		alert ("Browser does not support HTTP Request");
		return;
	}
	
	var url="?mod=advert&action=load_subcategories";
	url=url+"&cat="+cat;
	url=url+"&s=1";
	url=url+"&sid="+Math.random();
	xmlhttp.onreadystatechange = function() {
		subCategoriesForSearchLoaded();
	};
	xmlhttp.open("GET",url,true);
	xmlhttp.send(null);
}

function subCategoriesForSearchLoaded() {
	if (xmlhttp.readyState==4) {
		document.getElementById('subCategories').innerHTML=xmlhttp.responseText;
	}
}

function markAdvert(aid, checked) {
	xmlhttp=GetXmlHttpObject();
	if (xmlhttp==null) {
		alert ("Browser does not support HTTP Request");
		return;
	}
	
	var url="?mod=advert&action=mark";
	url=url+"&aid="+aid;
	url=url+"&marked="+checked;
	url=url+"&sid="+Math.random();
	xmlhttp.onreadystatechange = function(){};
	xmlhttp.open("GET",url,false);
	xmlhttp.send(null);
}

function pollVote() {
	pc_id = document.getElementById('selectedChoice').value;
	
	if (pc_id.length == 0) {
		alert('Pasirinkite už ką balsuojate!');
		return false;
	}
	
	xmlhttp=GetXmlHttpObject();
	if (xmlhttp==null) {
		alert ("Browser does not support HTTP Request");
		return;
	}
	
	var url="?mod=poll&action=vote";
	url=url+"&pcid="+pc_id;
	url=url+"&sid="+Math.random();
	xmlhttp.onreadystatechange = function() {
		pollVoted();
	};
	xmlhttp.open("GET",url,true);
	xmlhttp.send(null);
}

function pollVoted() {
	if (xmlhttp.readyState==4) {
		document.getElementById('poll').innerHTML = xmlhttp.responseText;
	}
}

function GetXmlHttpObject() {
	if (window.XMLHttpRequest) {
		// code for IE7+, Firefox, Chrome, Opera, Safari
		return new XMLHttpRequest();
	}
	
	if (window.ActiveXObject) {
		// code for IE6, IE5
		return new ActiveXObject("Microsoft.XMLHTTP");
	}
	
	return null;
}