Get The Current Url From The Address Bar?

how to get the current url from the address bar?

I done a huge google job and found "location.href" I've got that displaying the url of the page which is not what I want I'm using dynamic url's in php so the ID at the end of the url will always change, So I want to use javascript to get the current url meaning that it'll inlude the ID and to click a link with that current url. I tried this:

Code:
document.write("<a href='"+location.href+"' onclick="share();">Share With Your Friends</a>");