isNS = (navigator.appName == 'Netscape');
isIE = (navigator.appName.indexOf('Microsoft') != -1);
isOP = (navigator.appName == 'Opera');
ns4 = (document.layers);
ie4 = (document.all && !document.getElementById);
ie5 = (document.all && document.getElementById);
ns6 = (!document.all && document.getElementById);


function hide_div(what) { 
 obj = document.getElementById(what); 
 obj.className = 'off';	
}

function send_mail(form_, pole1, pole2, pole3, pole4, lang) {
	
	var form = document.getElementById(form_);

	var name = document.getElementById(pole1);
	var mail = document.getElementById(pole2);
	var rand = document.getElementById(pole3);
	var question = document.getElementById(pole4);
	
	var email_ = mail.value;
	var emailRegxp = /^([\w]+)(.[\w]+)*@([\w]+)(.[\w]{2,3}){1,2}$/;
	
	var erorr = "";
	
 if (lang) 	
 	{ 
		if (lang=='en')
			{
				if((name.value=="") || (question.value=="")) {
					erorr = erorr+"Filling the fields marked with  ' * ' is mandatory! \r\n";
				}
				
				if ((emailRegxp.test(email_) != true) || (mail == "")) {
					erorr = erorr+"Fill a valid e-mail address!";
				}
			}
	}
 else 
 	{
		if((name.value=="") || (question.value=="")) {
			erorr = erorr+"Попълването на полетата, отбелязани със ' * ' е задължително! \r\n";
		}
		
		if ((emailRegxp.test(email_) != true) || (mail == "")) {
			erorr = erorr+"Попълнете валиден e-mail адрес!";
		}
	}
	
	
	
	if( erorr == "") {
    form.submit();
  } else {
	 alert(erorr);
	}
}

// LOGIN CHECK
function send_konference(lang) {

	var form = document.getElementById('zapitvane');
	var pole1 = document.getElementById('date_start');
	var pole2 = document.getElementById('date_final');
	var pole3 = document.getElementById('ime');
	var pole4 = document.getElementById('tel');
	var pole5 = document.getElementById('mail');

	var erorr = "";
	var emailRegxp = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;

 if (lang) 	
 	{ 
		if (lang=='en')
			{
				if((pole1.value=="choose") || (pole2.value=="choose") || (pole3.value=="") || (pole4.value=="") || (pole5.value=="")) {
					erorr = erorr+"Filling the fields marked with  ' * ' is mandatory! \r\n";
				}
				if ((emailRegxp.test(pole5.value) != true) || (pole5 == "")) {
					erorr = erorr+"Fill a valid e-mail address!";
				}
			}
	}
		else 
			{
				if((pole1.value=="избери") || (pole2.value=="избери") || (pole3.value=="") || (pole4.value=="") || (pole5.value=="")) {
					erorr = erorr+"Попълването на полетата, отбелязани със ' * ' е задължително! \r\n";
				}
				if ((emailRegxp.test(pole5.value) != true) || (pole5 == "")) {
					erorr = erorr+"Попълнете валиден e-mail адрес!";
				}
			}
	
	if( erorr == "") {
    form.submit();
  } else {
	 alert(erorr);
	}
}

function close_reklama() {
 var obj = document.getElementById('reklama');
 obj.className='off';
}

function pos(what) {
	var winW = 931, winH = 460; // for old browsers

	if (parseInt(navigator.appVersion)>3) {
	 if (navigator.appName=="Netscape") {
		winW = window.innerWidth;
		winH = window.innerHeight;
	 }
	 if (navigator.appName.indexOf("Microsoft")!=-1) {
		winW = document.body.offsetWidth;
		winH = document.body.offsetHeight;
	 }
	}


 var obj = document.getElementById(what); 
 var browser_width = winW; //screen.width;
 var browser_height = winH; //screen.height;
 var top_ = browser_height/2-200;
 var left_ = browser_width/2-300;
 obj.style.left = left_+'px';
 obj.style.top = top_+'px';
 setInterval("close_reklama()",20000)
}