var js_category_old_onload = window.onload;
window.onload = function()
{
    if (typeof js_category_old_onload == 'function')
    {
         js_category_old_onload();
    }
	var selects = document.getElementById('filterCatFilter').getElementsByTagName('select');
	for(var i = 0; i < selects.length; ++i)
	{
		selects[i].onchange = function(){
			location.href = this.value;
		}
	}
}