Error on Webpage when logged into WP Admin

I get the following error when logged into WP Admin. Can you anyone help? Thank you.

Webpage error details

User Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; Trident/4.0; GTB5; SLCC1; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30618; MSN Optimized;US)
Timestamp: Thu, 2 Apr 2009 15:31:45 UTC

Message: Object doesn’t support this property or method
Line: 6
Char: 1
Code: 0
URI: http://naturalandhealthyreviews.com/wp-content/plugins/wp-security-scan/js/scripts.js