Error in IE9.0.12

[cloud216]

Getting an error that match value is null or can't be found. added this to get rid of it:

var oPercent; if ($(this).attr('style') != null) { oPercent = $(this).attr('style').match(/margin-left:(.*[0-9])/i) && parseInt(RegExp.$1);

    }
    return oPercent;

Any issues with this above?