problem when click back button

[Peixiao Lin]

I wrote a simple javascript function to allow user to click for an new text line in JSP page A. Code is as following:

function showNewLine(){
var text = "<input type='text' size='7' name="newLine" />
document.getElementById("switchMoreLines").innerHTML = text;
} 

After this line is added, I go forward to next page B. When I click back button to go back to page A, the newly added line disappear. This problem only happens in IE. The IE version I am using is IE 7. Please advise. Thank you so much.
[ February 06, 2007: Message edited by: Bear Bibeault ]