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)+ "<br>");
document.write(decodeURI(uri));
</script>
Output –
my%20test.asp?name=st%C3%A5le&car=saab
my test.asp?name=ståle&car=saab
anand.johari1994