function isEmail(who) {
	var email=/^[A-Za-z0-9]+([_\.-][A-Za-z0-9]+)*@[A-Za-z0-9]+([_\.-][A-Za-z0-9]+)*\.([A-Za-z]){2,4}$/i;
	return(email.test(who));
}

function endsWith(str, s){
	var reg = new RegExp (s + "$");
	return reg.test(str);
}

function blockingMessage( uz ){
 	var myWidth = 0, myHeight = 0;
    if( typeof( window.innerWidth ) == 'number' ) {
        //Non-IE
        myWidth = window.innerWidth;
        myHeight = window.innerHeight;
    } else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
        //IE 6+ in 'standards compliant mode'
        myWidth = document.documentElement.clientWidth;
        myHeight = document.documentElement.clientHeight;
    } else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
        //IE 4 compatible
        myWidth = document.body.clientWidth;
        myHeight = document.body.clientHeight;
    }

 	$('nemkattint').style.width = String(myWidth) + 'px';
	$('nemkattint').style.height = String(myHeight) + 'px';
        
    $('nemkattuzenet').innerHTML = uz;
    $('nemkattuzenet').style.display = 'block';
    $('nemkattint').style.display = 'block';
}