function checkNumber(field,text){
	var checkstr = "0123456789";
	var numberField = field;
	var numbervalue = "";
	var numberTemp = "";
	var err = 0;
	var i;
	
	err = 0;
	numberValue = numberField.value;
	
	for (i = 0; i < numberValue.length; i++) {
		if (checkstr.indexOf(numberValue.substr(i,1)) >= 0) {
			numberTemp = numberTemp + numberValue.substr(i,1);
			err=1;
		}
	}
	if (err != 1) {
		numberField.value = "";
		alert(text);
	}
}

function checkEmail(field,text){
	var DateField = field;
	var Datevalue = "";
	var DateTemp = "";
	var seperator = ".";

	DateValue = DateField.value;

	if (DateValue != "" && DateValue.indexOf('@', 0) == -1) {
		DateField.value = "";
		alert (text);
		return false; 
	}
}

function openWindow(file,name,width,height) {
	t=window.open(file,name, 'toolbar=no,menubar=no,scrollbars=no, resizable=no,status=no,location=no,directories=no,top=60, left=100,width='+width+',height='+height+'');
	t.focus();
}

function browser(ie,ns) {
	if(document.all)
		document.write(ie);
	else if(document.layers)
		document.write(ns);
	else
		document.write(ie);
}

function empty(el) {
			
	el.value="";
}


function validateRecUs() {
	el = document.recommendUs.elements["sendFrom"];
	if (el.value != "" && el.value.indexOf('@', 0) == -1 || el.value == "") {
		alert ("Nieprawidłowy adres e-mail w polu polecający");
  		return false;
	}
	el = document.recommendUs.elements["sendTo"];
	if (el.value != "" && el.value.indexOf('@', 0) == -1 || el.value == "") {
		alert ("Nieprawidłowy adres e-mail w polu polecany");
  		return false;
	}
}