help with storing multiple values in session variables.

Hi, I have php configured to use sessions. I have a web-database application and have the following problem with sessions I fetch values from database and these values get passed across forms either with POST for submit opion OR GET with href. Now i have problem passing unicode strings with href and GET. Embedding unicode values with get does not work out. I cannot use POST method here since i navigate with href. So i tried assiging the value to a SESSION variable. For the first time the application works, but if i refresh and try with a different href link, always the first assigned value only gets passed? What do i do to change the value of session variable in the same session? I cannot use global variables since, i have register globals off? Is there any way of passing unicode strings properly with href and get? I'm almost in completion where this problem croped? Any idea how to solve. -vimala/.