function isValidMail(sValue){	
	var k1=0;
	var k2=0;
	var ok1=0;
	var ok2=0;
	var n=sValue.length;
	var pozdot=0;
	var pozsign=0;
	for(var i=0;i<n;i++){
		if(sValue.charAt(i)=='@'){
			ok1=1;
			k1=k1+1;
			pozsign=i;
		}
		if(sValue.charAt(i)=='.'){
			ok2=1;
			k2=k2+1;
			pozdot=i;
		}
	}
	if(pozsign==0){
		//letters not before "@"		
		return false;
	}
	if(pozdot<=pozsign){
		//"." not after "@"		
		return false;
	}
	if(pozdot>n-3){
		//not letters after "."		
		return false;
	}
	if((k1!=1)){
		//only "@" in address 		
		return false;
	}
	if((ok1!=1) || (ok2!=1)){
		//"@" and "." in address		
		return false;
	}
return true;
}

function registration(lang)
{
	window.open('registration.asp?lang='+lang,'registration','toolbar=no,scrollbars=no,resizable=no,width=680,height=580')
}    

function popup(title,path,width,height)
{
	window.open('popup/image_pop.asp?title='+ title + '&image_path='+path,'popup','toolbar=no,scrollbars=no,resizable=no,width=' + width + ',height=' + height)
}