var use_cookie = false;
var cookie_signedup = "You have signed up for an e-mail alert with";

em_pic1= new Image(16,16); 
em_pic1.src=".//plugins/em_sub/loading.gif"; 
em_pic2= new Image(16,16); 
em_pic2.src="./plugins/em_sub/x.png"; 
em_pic3= new Image(16,16); 
em_pic3.src="./plugins/em_sub/valid.png"; 

onload = function(){
	if(use_cookie){
		em_cookie = getcookie("em_email");
		if (em_cookie){
			document.getElementById('em_sub').innerHTML = cookie_signedup+" "+em_cookie.split(",");
		}
	}
}

function checkemail(obj, event){
	if(!event) event = window.event;

	img = document.getElementById('em_gb');
	but = document.getElementById('em_subbut');
	
	email = obj.value;
	emailfilter=/^([0-9]{1,4})$/i;
	if(emailfilter.test(email)){
		img.src="./plugins/em_sub/valid.png";
		but.style.display = "inline-block";
		if(event.keyCode == 13){
			but.click();
		}
	}
	else{
		if(event.keyCode == 13){
			alert("введите корректное название ссылки!");
		}
		img.src="./plugins/em_sub/x.png";
		but.style.display = "none";
	}
}

function checkname(obj, event){
	if(!event) event = window.event;

	img = document.getElementById('em_gb_name');
	but = document.getElementById('em_subbut');
	
	chname = obj.value;
	namefilter=/^([0-9]{1,4})$/i;
	if(namefilter.test(chname)){
		img.src="./plugins/em_sub/valid.png";
		if(event.keyCode == 13){
			alert("введите корректное имя раздела!");		
		}
	}
	else{
		if(event.keyCode == 13){
			alert("введите корректное имя раздела!");
		}
		img.src="./plugins/em_sub/x.png";
		but.style.display = "none";
	}
}


function createXMLHttpRequest() 
{

   try { return new ActiveXObject("Msxml2.XMLHTTP"); } catch (e) {}
   try { return new ActiveXObject("Microsoft.XMLHTTP"); } catch (e) {}
   try { return new XMLHttpRequest(); } catch(e) {}
   alert("XMLHttpRequest not supported");
   return null;
   
 }

function sub_email(){
	var ajReq;
	email = document.getElementById('em_txt').value;
	email = use_cookie ? email+"&c=1" : email+"&c=0";
	
	res_area = document.getElementById('em_sub');
	ajReq = createXMLHttpRequest();
	ajReq.open( "GET", "em_sub/write.php?e="+email, true );
	ajReq.setRequestHeader("X-Requested-With", "XMLHttpRequest");
	res_area.innerHTML = '<img src="em_sub/loading.gif">';
	ajReq.onreadystatechange = function(){
		if ( ajReq.readyState != 4 ) return;
		res_area.innerHTML = ajReq.responseText;
	}
	ajReq.send( null );
}