Count The Number Of Characters

I want to count the characters in a string. The problem here is, the 'return key' i.e if 'enter key' should be counted as 2 instead as 1 character.

I tried few logics but none of them worked out. I tried with php ajax too. It worked fine in firefox but not in IE.

Here is the logic i used. When onkeyup call the js function.. which calls the php page by passing the string as encodeURIComponent(str).

Now, I took the string in php and counted the in the string and added the no of occurrence of to the string length.

My concern is, IE is returning 3 for return key instead of 2.