is there any way to insert blank space that can't trimmed?

is there any way to insert blank space illusion whit new string that the trim function the one that removes spaces (like the trim function in asp)
i mean some kind of invisible char or what ever that i can insert inside of html textbox and the trim function not
going to work on it?
or some kind of extra invisible char or combination that will leave invisible char in the created string?

thanks!

The following generates one space character in HTML, and is unaffected by trim(). 

ALT-255