How to get the URL parts using Javascript

Hi,
Here is the code to get the URL parts using Javascript.
1) How to get the path name
var pathname= window.location.pathname;
alert( " Pathname "+ pathname );
2) How to get the hostname
var hostname = window.location.host;
alert( hostname);
3) How to get the complete URL
var URL = window.location;
alert("URL "+URL);
4) How to get the URL with out parameters
var URLWithOutPrameters = window.location.protocol + "//" + window.location.host + "/" + window.location.pathname;
alert(URLWithOutPrameters );
5) How to get the Protocal in the URL.
var protocal = window.location.protocol;
alert( " protocal "+ protocal);
5) How to get the parameters in the URL
var name = "tagName"; // We can place any name , the name should contain in the URL.
name = name.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]");
var regexS = "[\\?&]"+name+"=([^&#]*)";
var regex = new RegExp( regexS );
var results = regex.exec( window.location.href );
if( results != null )
alert( results[1]); // will display the value of the name (key value pair) ,
}