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CSS Expressions performance

 
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I have the following CSS expressions being used within style sheet

Top: expression(document.getElementById("griddatatable").scrollTop-2); position: relative; z-index: +10;}

These are being used to make the table columns freeze while scrolling horizontally. But this as expected is causing a huge performance issue.

I want to know how I can optimize such a expression or if there is any other alternative to this.
 
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expressions are very slow and there is really nothing you can do. You can try to put the document.getElementById("griddatatable").scrollTop into a JS variable on the page and see if the speed improves.

Eric
 
Puneet Agarwal
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I am getting Syntax Error in IE when I am trying to use the following style

.griddatatable-header{ height:10px; background-color:#E4E3E3; border-width:1px; font-size: 11px; font-weight: bold; text-align: left; overflow:hidden; Top: expression(if (!window["grid"]){window["grid"]=document.getElementById("griddatatable")}window["grid"].scrollTop-2); position: relative;}

I dont get the syntax error when I use the following style:

.griddatatable-column-scroll{ height:10px; background-color:#E4E3E3; border-width:1px; font-size: 11px; font-weight: bold; text-align: left; overflow:hidden; Top: expression(document.getElementById("griddatatable").scrollTop-2); position: relative;}

The syntax error comes when page is being loaded.
 
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