/*wyszykiwanie w naglowku strony*/
function sprawdz_dane ()
{
  var formularz=document.forms['szukaj'];

  if (formularz.txtSearch.value.length  < 4)
  {
  	alert ("Pole szukaj musi mieć minimum 4 znaki");
	return false;
  }
  
	return true;
}

/*simple AJAX call*/
function xmlhttpPost(strURL, strDivId, queryString) {
	//alert('strURL: '+strURL+'\n strDivId: '+strDivId+'\n queryString'+queryString);
	var xmlHttpReq = false;
	var self = this;
	// Mozilla/Safari
	if (window.XMLHttpRequest) {
		self.xmlHttpReq = new XMLHttpRequest();
	}
	// IE
	else if (window.ActiveXObject) {
		self.xmlHttpReq = new ActiveXObject("Microsoft.XMLHTTP");
	}
	self.xmlHttpReq.open('POST', strURL, true);
	self.xmlHttpReq.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
	self.xmlHttpReq.onreadystatechange = function() {
		if (self.xmlHttpReq.readyState == 4) {
			document.getElementById(strDivId).innerHTML = self.xmlHttpReq.responseText;
		}
	}
	self.xmlHttpReq.send(queryString);
}

/* sprawdz formularz - podreczniki */
function validateSchoolbook()
{
	var formularz=document.forms['schoolbookForm'];
  
	if(formularz.cboSchool.value == '-1' || formularz.cboClass.value == '-1')
	{
	 	alert('Proszę wybrać szkołę i klasę');
		return false;
	}
	return true;
}