Using URL parameters on Salesforce standard pages

Salesforce has many URL parameters can be used on its standard page, with this kind of parameters, you can do some URL hacking on it, as below:

Note: All of parameters must be encoded with UTF-8.

Login page

There are two ways to login and access into Salesforce from url.

1. https://<SFDC Instance Url>/

Parameter	Description
un	Username
pw	Password
startURL	The url will be redirected to after logged in

e.g. login directly and redirect to Account list view.

https://test.salesforce.com/?un=yourname%40force.com&pw=123456&startURL=%2F001

2. /secur/frontdoor.jsp

Parameter	Description
sid	Session ID
retURL	The url will be redirected after logged in

e.g. login with session ID and redirect to Account list view.

https://test.salesforce.com/?sid=fyfxtCUtm2A3JwaRRDBE28&retURL=%2F001

Edit / New page

Parameter	Description
retURL	The url will be redirected after opperation done. Note : this parameter works on almost all of Salesforce page.
cancelURL	The url will be redirected after canceled, it has priority over retURL
saveURL	The url will be redirected after saved, it has priority over retURL
<Field input name>	Set a default value for field, field name needs to be the input name, which you can find it from Chrome Developer Tools as below capture.
<Field input name>_lkid	Set a default id value for lookup field, e.g. acc3_lkid=001A000000i1zzz

Field input name on edit page

e.g. Redirect to Account list after canceled

https://ap.salesforce.com/001/e?cancelURL=%2F001&nooverride=1

e.g. Set default values for field “Name” and “AccountCode__c” of Account

https://ap.salesforce.com/001/e?00N10000007LHTd=012345&acc2=NewAccount

Report

Parameter	Description
break[n]	Summarize information by, e.g. break0=CUST_OWNER_NAME
scope	Show scope, e.g. scope=user user : My Objects team : My team’s Objects useronly : User owned objects queue : Queue owned objects organization : All objects
colDt_c	Date Field, e.g. colDt_c=DUE_DATE
colDt_q	Date Range, e.g. colDt_q=curfy
sdate	Date Range From, yyyy/MM/dd
edate	Date Range To, yyyy/MM/dd
pc[n]	Condition field name, e.g. pc0=LAST_ACTIVITY
pn[n]	Condition, e.g. pn[0]=eq eq : equals ne : not equal to lt : less than gt : greater than le : less or equal ge : greater or equal co : contains nc : does not contain sw : starts with
pv[n]	Condition value
details	Shows detail, yes or no
sort	Sort by field, e.g. sort=ACCOUNT.NAME

Reference :
http://blog.livedoor.jp/minoaw/archives/1388267.html
http://raydehler.com/cloud/clod/salesforce-url-hacking-basics-with-returl-saveurl-and-cancelurl.html