function zmien_klase_CSS(nazwa_nowej_klasy, element) {
	var el = document.getElementById(element);
	el.className = nazwa_nowej_klasy;
}
function ladujstrone(strona)
{
 window.location.replace(strona);
 }
function Pokaz(obraz) {

	var theimg = document.getElementById(obraz);
	
	var thewin = window.open(theimg.src.replace("_tn.jpg",".jpg"), "Powiekszenie","titlebar=no, toolbar=no, scrollbars=yes, resizable=yes, width=850, height=650 " );
				
	thewin.document.close();
}

function test(element)
{
	var obrazek1 = document.getElementById("kod_test");
	var obrazek2 = document.getElementById("autor_test");
	var obrazek3 = document.getElementById("mail_test");
	var formularz = document.getElementById(element);
	var test1=0;
	var test2=0;
	var test3=0;
	if(formularz.kod.value.length>0)
	{
		if((formularz.kod.value.length==4)&&(formularz.kod.value.replace(/[0-9]+/,'')==''))
		{
		test1=1;
		obrazek1.innerHTML='<img alt="ok" src="images/ok.gif"/>';
		}else{
		obrazek1.innerHTML='<img alt="no" src="images/no.gif"/>';
		}
	}else{
	obrazek1.innerHTML='';
	}
	if(formularz.autor.value.length>0)
	{
		if((formularz.autor.value.length>3)&&(formularz.autor.value.replace(/[a-zA-Z0-9]+/,'')==''))
		{
		test2=1;
		obrazek2.innerHTML='<img alt="ok" src="images/ok.gif"/>';
		}else{
		obrazek2.innerHTML='<img alt="no" src="images/no.gif"/>';
		}
	}else{
	obrazek2.innerHTML='';
	}
	if(formularz.mail.value.length>0)
	{
		if(emailValidator(formularz.mail)==true)
		{
		test3=1;
		obrazek3.innerHTML='<img alt="ok" src="images/ok.gif"/>';
		}else{
		obrazek3.innerHTML='<img alt="no" src="images/no.gif"/>';
		}
	}else{
	obrazek3.innerHTML='';
	}
	if(test1==1&&test2==1&&test3==1)
	{
	formularz.what.disabled=false;
	}else{
	formularz.what.disabled=true;
	}
	
}
function emailValidator(elem){
var emailExp = /^[\w\-\.\+]+\@[a-zA-Z0-9\.\-]+.[a-zA-z0-9]{2,4}$/i;
if(emailExp.test(elem.value)){
return true;
}else{
return false;
}
}