Untitled

<!doctype html>
<html>
<head>

<script>
var x=window.prompt("Enter a number");
var y=window.prompt("Enter a second number");
var msg="";

for(var i=0;i<x;i++)
{
msg+=" <p><button onclick='dosmth()'>Click me</button></p>";
}
document.write(msg);

function dosmth(){
var z=window.prompt("Enter the col number");

for(var i=0;i<y;i++)
 { for(var j=0;j<z;j++)
     {
    document.write("|_");
     }
     document.write("<br>");

}


}


</script>

</head>
<body>
</body>


</html>