This behavior occurs if your browser does not support the Cascading Style Sheet (CSS) Level 2 specification. When saving a worksheet that contains hidden rows and columns, Excel saves information about the hidden rows and columns in the
display property of the
style attribute of the table row (<TR>) tag, similar to the following example:
<tr height=0 style='display:none'>
The
display property is based on the CSS Level 2 specification.
display:none indicates that no boxes should be displayed. Therefore, if your browser does not support the CSS Level 2 specification, it may display the hidden columns or rows partially or entirely. This is a limitation of the browser, not of Excel. Note that Microsoft Internet Explorer 5 does support the CSS Level 2 specification.