when i use http://  in var edge the location replace url but when i did not use the url will be a path 

exemple 

location.replace(edge+document.location.hash)

 var edge = http://google.com

the location replace to google.com

but when  i use var edge = google.com 

the url google.com will be a patch like this

site.com/google.com

i want  correct  to with http:// or not the lacation replace .

any solution ?