function submit_sortform_button() {

    var types      = [];
    var categories = [];
    var platforms  = [];
    var fields     = [];

    $("input[@name=company_type]:checked").each(function(i,elem) { 
        types.push(elem.value);
    });

    $("input[@name=solution_category]:checked").each(function(i,elem) { 
        categories.push(elem.value);
    });

    $("input[@name=solution_platform]:checked").each(function(i,elem) { 
        platforms.push(elem.value);
    });

    $("input[@name=solution_field]:checked").each(function(i,elem) { 
        fields.push(elem.value);
    });

    var pathname = document.location.pathname;
    var queries  = [];
    var by = function(a, b) { return (parseInt(a) > parseInt(b)) ? 1 : -1 };

    types.sort(by);
    categories.sort(by);
    platforms.sort(by);
    fields.sort(by);

    if(types.length > 0) {
        queries.push("type=" + types.join("."));
    }

    if(categories.length > 0) {
        queries.push("category=" + categories.join("."));
    }

    if(platforms.length > 0) {
        queries.push("platform=" + platforms.join("."));
    }

    if(fields.length > 0) {
        queries.push("field=" + fields.join("."));
    }

    if(queries.length>0) { 
        document.location.href= pathname  + "?" + queries.join("&");
    } else {
        document.location.href= pathname;
    }
}