[jQuery] IE crash

[jQuery] IE crash

I am getting random crashes on IE, that are not
consistently reproducible, using jQuery to "window
shade" a box. I can usually get it to crash by opening
and closing boxes and scrolling the window for a
couple minutes. These crashes did not happen on an
older version of jQuery as far as I can remember. I am
getting no Javascript errors. The code I am working
with is:
$("div.secTitleContainer")
    .css("padding-left","20px")
    .prepend('<a href="javascript:void(0);"
class="closeBoxButton"></a>')
    .find("a")
    .toggle(function(){
        this.blur();
    
$(this).addClass("openBoxButton").removeClass("closeBoxButton");
    
$("../../../../div:last",this).slideUp("fast",{onComplete:function(){
            this.style.height = 'auto';
        }});
    },function(){
        this.blur();
    
$(this).addClass("closeBoxButton").removeClass("openBoxButton");
    
$("../../../../div:last",this).slideDown("fast",{onComplete:function(){
            this.style.height = 'auto';
        }});
    });
Thank you for any help provided.
- Christian Gove
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