problem with IE - homepage note fully loaded

[msamaha]

hi

my website address is www.windowres.net and i uses phoca template. the site loads very slow on internet explorer and i keep getting the following error " object doesn't support this property or method " and the home page doesn't loads fully and there is a white empty space between the footer and the site. This is not an issue with FIREFOX

any idea why this is happening and can I fix the problem

Many thanks
Marwan