Q:

How to load different scripts for different versions of IE? 

I use these scripts to repair the errors in IE (Hacks). 
There is one for each version. 

I know that everything has IE9.js IE8 and 7 but would like to load
  only the necessary script to that version of the browser;

Today my code is as follows:
<! --[if lt IE 7]>
    <script src="@Url. Content("~/Scripts/IE7.js")"></script>
    <script src="@Url. Content("~/Scripts/ie7-squish.js")"></script>
<![ endif]-->

<! --[if lt IE 8]>
    <script src="@Url. Content("~/Scripts/IE8.js")">IE7_PNG_SUFFIX=".png";</script>
    <script src="@Url. Content("~/Scripts/ie7-squish.js")"></script>
<![ endif]-->

<! --[if lt IE 9]>
    <script src="@Url. Content("~/Scripts/IE9.js")"></script>
    <script src="@Url. Content("~/Scripts/ie7-squish.js")"></script>
<![ endif]-->

I would not like to use something like <! --[if eq IE 8]> because I do not know how it would behave in such versions as IE8.5. 
I do not know if there is else, I searched the internet and did not see anyone commenting on this.  But it would be the ideal solution. 
Something like this:
<! --[if lt IE 7]>
    <script src="@Url. Content("~/Scripts/IE7.js")"></script>
    <script src="@Url. Content("~/Scripts/ie7-squish.js")"></script>
<![ elseif lt IE 8]-->
    <script src="@Url. Content("~/Scripts/IE8.js")">IE7_PNG_SUFFIX=".png";</script>
    <script src="@Url. Content("~/Scripts/ie7-squish.js")"></script>
<![ elseif lt IE 9]-->
    <script src="@Url. Content("~/Scripts/IE9.js")"></script>
    <script src="@Url. Content("~/Scripts/ie7-squish.js")"></script>
<![ endif]-->

I appreciate the help. 

A:

You do not need to include IE7/IE8.js if you are using IE9.js

<! --[if lt IE 9]>
    <script src="@Url. Content("~/Scripts/IE9.js")"></script>
    <script src="@Url. Content("~/Scripts/ie7-squish.js")"></script>
<![ endif]-->

Problem solved.