style.fill Not Working in IE

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ASP.NET

Javascript

I some Javascript code that does not to fully work in IE. Its suppose to fill in an interactive image with highlights. It works fine in Chrome and better in Firefox. It appears the style.fill = "#somecolor" lines are not working (supposed??) in IE.

$(document).ready(function() {

    //
    R = Raphael("stateMap", 700, 475);
    tooltip = new Tooltip();
    for ( var stateCode in usMap) {
        var sObj = usMap[stateCode];
        Rstates[stateCode] = R.path(sObj.path).attr(Rattr);
        if (!!sObj.properties) {
            Rstates[stateCode][0]._zoom = sObj.zoom;
            Rstates[stateCode][0]._title = sObj.title;
            Rstates[stateCode][0]._lat = sObj.lat;
            Rstates[stateCode][0]._lng = sObj.lng;
            Rstates[stateCode][0].style.fill = "#d3d3d3"; // init medium grey overlay
            Rstates[stateCode][0].style.cursor = "pointer";
            Rstates[stateCode][0].onmouseover = function(event){
                this.rel = this.style.fill;
                this.style.fill = "#68973a"; //fill with green
                tooltip.awake(this._title,event);
            };
            Rstates[stateCode][0].onmousemove = function(event) {
                tooltip.move(event);
            };
            Rstates[stateCode][0].onmouseout = function(){
            this.style.fill = "#d3d3d3"; // mouse out color back to medium grey
                tooltip.sleep();
            };
            Rstates[stateCode][0].onmousedown = function() {
                selectedState = this;
                map.setCenter(new google.maps.LatLng(this._lat,this._lng));
                map.setZoom(this._zoom);
                $('#stateMap').fadeOut();
                var n = $('<a>').attr({href:'#'}).html("United States").click(resetNationMap);
                var s = $('<a>').attr({href:'#'}).html(this._title).click(resetStateMap);

                $('#viewStateMap').html(n).append(' &raquo; ').append(s).fadeIn();
            }
        }
    }
});

is there a work around to get the lines like below to work?

this.style.fill = "#68973a";

Thanks

Eric