For some reason IE8 decided to give the "invalid argument" for this page when running the following code
$( "#slider-range" ).slider({
    range: true,
    min: 0,
    step:5,
    max: 50,
    values: [ $('#fro').val(), $('#to').val() ],
    slide: function( event, ui ) {
        $( "#fro" ).val(ui.values[0]);
        $( "#to" ).val(ui.values[1]);
        $( "#asdf" ).html( window.currencySymbol + ui.values[0] + " - " + window.currencySymbol + ui.values[1]);    
    },
    stop:function( event, ui ) {
        $.address.parameter('priceFrom', ui.values[0]);
        $.address.parameter('priceTo', ui.values[1]);
    }
});
I can't find any info about why. What's wrong with it? In all the other browsers there's no problem as usual. Only IE8