This is not a valid value for top properties

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Why the error is giving Validation(CSS 2.1):expression(this.offsetParent.scrollTop)

my cs coading is given below

CSS

<style type="text/css">
.HeaderFreez
{
position:relative ;
top:expression(this.offsetParent.scrollTop);
z-index: 10;
}
</style>

Posted 14-May-12 18:52pm

Janardan Pandey

Updated 14-May-12 18:59pm

Prasad_Kulkarni

v2

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member60 · Answer 1 · 2012-05-14T19:22:00

Sometimes In the CSS Editor of Visual Studio 2005, the expression(offsetParent.scrollTop) will be treated as a invalid value, and will show this invalid values in the Error List.

You can configure the Visual Studio 2005 not to show this error by Tools -> Options -> Text Editor -> CSS -> CSS Specific -> Uncheck "Detect invalid values".

You also can try to put this CSS code to the <style type="text/css"> tags under header section of your page.

I think you are using VS 2005 if yes ,this helps.

Sebastian T Xavier · Answer 2 · 2012-05-14T18:59:00

Solution 1

What does

this.offsetParent.scrollTop

returns?

please confirm that. I strongly believe that the issue is in this line

top:expression(this.offsetParent.scrollTop);

Regards
Sebastian

Posted 14-May-12 18:59pm

Sebastian T Xavier

Comments

Janardan Pandey 15-May-12 2:42am

this enable heading remain top at gridview