EncodeURl() is used to convert URL into their hex coding. And DecodeURI() is used to convert the encoded URL back to normal.

<script>

var uri="my test.asp?name=ståle&car=saab";

document.write(encodeURI(uri)+ "

");

document.write(decodeURI(uri));

</script>

Output -

my%20test.asp?name=st%C3%A5le&car=saab

my test.asp?name=ståle&car=saab