Untitled

<html>
<head>
	<style type="text/css">
		input{
width:100px;
height:100px;
background-color:black;
color:white;
font-size:70px;


		}

		.nowy{
width:308px;
height:20px;
background-color:red;
color:yellow;
font-size:10px;


		}


	</style>
	<title>Układanka</title>
	<script type="text/javascript">
		function wolny(x)
		{
			if (x.value=="")

			return true;
			else

			return false;


		}
						button8,		button9
		function zamien2(x,              y,z)
		{
			if(wolny(y))
			{
				y.value=x.value;
				x.value="";
			}
			else
			if(wolny(z))
			{
				z.value=x.value;
				x.value="";
			}

		}
		function zamien3(x,              y,z,w)
		{
			if(wolny(y))
			{
				y.value=x.value;
				x.value="";
			}
			else
			if(wolny(z))
			{
				z.value=x.value;
				x.value="";
			}
			else
			if(wolny(w))
			{
				w.value=x.value;
				x.value="";
			}

		}
		function zamien4(x,              y,z,w,v)
		{
			if(wolny(y))
			{
				y.value=x.value;
				x.value="";
			}
			else
			if(wolny(z))
			{
				z.value=x.value;
				x.value="";
			}
			else
			if(wolny(w))
			{
				w.value=x.value;
				x.value="";
			}
			else
			if(wolny(v))
			{
				v.value=x.value;
				x.value="";
			}


		}

function pomieszaj()
{
	for(k=0;k<10000;k++)
	{
let los=Math.round(Math.random()*10);
switch (los)
{
case 1: zamien2(button1,button2,button4); break;
	case 2: zamien3(button2,button1,button3,button5); break;
	case 3: zamien2(button3,button2,button6); break;
	case 4: zamien3(button4,button1,button5,button7); break;
	case 5: zamien4(button5,button2,button4,button6,button8); break;
	case 6: zamien3(button6,button3,button5,button9); break;
	case 7: zamien2(button7,button4,button8); break;
	case 8: zamien3(button8,button5,button7,button9); break;
	case 9: zamien2(button9,button6,button8); break;
}
}


}


	</script>
</head>
<body>
	<input type="button" value="1" id="button1" onclick="zamien2(button1,button2,button4)" >
	<input type="button" value="2" id="button2" onclick="zamien3(button2,button1,button3,button5)">
	<input type="button" value="3" id="button3" onclick="zamien2(button3,button2,button6)"><br>
	<input type="button" value="4" id="button4" onclick="zamien3(button4,button1,button5,button7)">
	<input type="button" value="5" id="button5" onclick="zamien4(button5,button2,button4,button6,button8)">
	<input type="button" value="6" id="button6" onclick="zamien3(button6,button3,button5,button9)"><br>
	<input type="button" value="7" id="button7" onclick="zamien2(button7,button4,button8)">
	<input type="button" value="8" id="button8" onclick="zamien3(button8,button5,button7,button9)">
	<input type="button" value="" id="button9" onclick="zamien2(button9,button6,button8)"> <br>
	<input type="button" value="Pomieszaj" class="nowy" onclick="pomieszaj()">


</body>
</html>