Untitled

<!DOCTYPE HTML>
<html>
<head>
<meta charset='utf-8'>
<title>Zadanko</title>
</head>
<body>
<input type="text" id="haslo">
<p id="zawartosc"></p>
<input type="button" id="przycisk" value="Sprawdź">

<script>
function yeah(){
haslo=document.getElementById("haslo").value;
if(haslo.length==0){
document.getElementById("zawartosc").style="color:red";
document.getElementById("zawartosc").innerHTML="WPISZ HASŁO!";
}
else if(/[1-9]/.test(haslo) && (haslo.length>6)){
document.getElementById("zawartosc").style="color:green";
document.getElementById("zawartosc").innerHTML="DOBRE";
}
else if(/[1-9]/.test(haslo) && (haslo.length>3) && (haslo.length<7)){
document.getElementById("zawartosc").style="color:blue";
document.getElementById("zawartosc").innerHTML="ŚREDNIE";
}
else{
document.getElementById("zawartosc").style="color:yellow";
document.getElementById("zawartosc").innerHTML="SŁABE";
}
}
document.getElementById("przycisk").addEventListener("click",yeah);


</script>
</body>
</html>