<script>
function f(){
var x = input1.value
 if(x==""){
 p1.style.color="red"
 p1.innerHTML="WPISZ HASŁO"
 }
 else if(x.search("[0-9]")>=0 && x.length>6){
 p1.style.color="green"
 p1.innerHTML="DOBRE"
 }
 else if(x.search("[0-9]")>=0 && x.length>=4 && x.length<=6){
 p1.style.color="blue"
 p1.innerHTML="ŚREDNIE"
 }
 else {
 p1.style.color="yellow"
 p1.innerHTML="SŁABE"
 }
}
</script>
 </body>
</html>