Website looks awful in IE but great in Firefox - IE not reading javascript

I am using a template for a website and it looks great on safari and firefox. However, on internet explorer it is a big mess and it seems开发者_开发百科 as though the javascript is being ignored. Can someone please help me? I am not familiar with javascript, but I can edit parts of it if necessary. The website is at www.erindalesystems.com/ES

I also have the javascript code in the ES folder where the home page is.

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A lot of your CSS looks to be using proprietary mozilla extensions e.g.:

-moz-border-radius-bottomright: 20px;
-moz-border-radius-topright: 20px;
-moz-box-shadow: 2px 2px 0 rgba(0, 0, 0, 0.1);
background-image: -moz-linear-gradient(center top , #EE3C09, #B90909);

Everything prefixed with -moz will be ignored by most IE instances.

I'd replace these with their CSS3 equivalents, and give a little time to testing in IE (although it pains me to say this).