http-equiv="X-UA-Compatible" and IE - 9 compatibility view - site crashes - crash

Question

I added this tag:
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
in to my header.
In IE 9 my browser crashes if I add the domain of my site in to the compatibility view list of the browser and then I call my website.
Also the browser crashes if I work on IE 11 and I am going to browsermode 9.
I have to add this meta tag.
What can I do?
Where do I wrong?
additional:
I found out that this meta tag doesn`t work well in combination with this part of script:
window.CSSHover = (function(){
var REG_INTERACTIVE = /(^|\s)((([^a]([^ ]+)?)|(a([^#.][^ ]+)+)):(hover))/i,
REG_AFFECTED = /(.*li?|.*ul?)\:(hover)/i,
REG_PSEUDO = /[^:]+:([a-z-]+).*/i,
REG_SELECT = /(\.([a-z0-9_-]+):[a-z]+)|(:[a-z]+)/gi,
REG_CLASS = /\.([a-z0-9_-]*on(hover))/i,
REG_MSIE = /msie (5|6|7|8|9)/i,
REG_COMPAT = /backcompat/i;
var CSSHOVER_PREFIX = 'csh-';
var CSSHover = {
elements: [],
I am calling this script in the body with: [%- IF BROWSER=="MSIE" AND BROWSERVERSION < "9.0" -%]style="behavior: url(/css/csshover.h);" [%- END -%]
callbacks: {},
init:function() {
if(!REG_MSIE.test(navigator.userAgent) && !REG_COMPAT.test(window.document.compatMode)) return;
var sheets = window.document.styleSheets, l = sheets.length;
for(var i=0; i<l; i++) {
this.parseStylesheet(sheets[i]);
}
},