javascript 获得URL

thisURL = document.URL;     // http://localhost:81/Test/1.htm?Did=123
thisHREF = document.location.href; // http://localhost:81/Test/1.htm?Did=123
thisSLoc = self.location.href;   // http://localhost:81/Test/1.htm?Did=123
thisDLoc = document.location;   // http://localhost:81/Test/1.htm?Did=123

thisTLoc = top.location.href;   // http://localhost:81/Test/1.htm?Did=123
thisPLoc = parent.document.location;// http://localhost:81/Test/1.htm?Did=123
thisTHost = top.location.hostname; // localhost
thisHost = location.hostname;   // localhost

thisU1 = window.location.protocol; // http:
thisU2 = window.location.host;   // localhost:81
thisU3 = window.location.pathname; // /Test/1.htm