'style.cssText' is null or not an object

I am doing a job which is a web site using infragistic control webgrid to show sth.

after i tested at home via IE8, showing script error as below:

 

Webpage error details

User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1) ; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022; InfoPath.2; MS-RTC LM 8; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)
Timestamp: Sun, 14 Aug 2011 03:04:41 UTC

Message: 'style.cssText' is null or not an object
Line: 1449
Char: 3
Code: 0
URI: http://www.sd-tex.com/WebResource.axd?d=qc356J8H7LfSJbG7BSKRmG52-Ub93hEE8Rj0k6OJc1mF4QM0KGl_7TfF_msdJoi4V89N2sa4OS6jHn4BjdI4TMplBuiBzpmo9scGslRmFync6nm-0_t2-8B85rzxt1n90&t=634471919920000000

 

References

1. http://rosshawkins.net/archive/2006/10/08/webresource.axd.aspx

 

I am gooogling result , known the NetAdvantage 6.3 doesnot support IE8. Must be upgraded to 2009 Volum2 or later.http://www.infragistics.com/support/product-lifecycle.aspx#SupportedEnvironments.