function checkNEmail(form) {
			if (isBlank(form.email.value) || isBlank(form.name.value) || !isEmailValid(form.email.value) ) 
			{
				alert("Wpisz poprawny adres email.");
				form.email.focus();
				return false;
			}
			}

		function checkEmail(form) {
			if (isBlank(form.email.value) || !isEmailValid(form.email.value) ) {
				alert("Wpisz poprawny adres email.");
				form.email.focus();
				return false;
			}
		return true;

		}

		function isBlank(fieldValue) {
			var blankSpaces = / /g;
			fieldValue = fieldValue.replace(blankSpaces, "");
			return (fieldValue == "") ? true : false;
		}

		function isEmailValid(fieldValue) {
			var emailFilter = /^.+@.+\..{2,4}$/;
			var atSignFound = 0;
			for (var i = 0; i <= fieldValue.length; i++)
				if ( fieldValue.charAt(i) == "@" )
					atSignFound++;
			if ( atSignFound > 1 )
				return false;
			else
				return ( emailFilter.test(fieldValue) && !doesEmailHaveInvalidChar(fieldValue) ) ? true : false;
		}

		function doesEmailHaveInvalidChar(fieldValue) {
			var illegalChars = /[\(\)\<\>\,\;\:\\\/\"\[\] ]/;
			return ( illegalChars.test(fieldValue) ) ? true : false;
		}