function isUrl(s) {
        var regxp = / +/;

        if(regxp.test(s)) {
            return false;
        };

    var regexp = /(\w+:{0,1}\w*@)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?/
    return  regexp.test(s);
}

$(document).ready(function() {
    $('#type_url').click(function(){
            l = $('#link_url').val();
                    if(l!=''){
                        h = $(this).parent().attr('href');
                        $(this).parent().attr('href',h+'?url='+l);
                }
    });
    $("#upload-form").submit(function(){
        if(!$('#accept_terms').attr('checked')){
                alert('Please accept terms of service')
                return false;
            }
        return true
        })
       $("#upload_submit").click(
        function(){

            if(!isUrl($('#link_url').val())){
                alert ("Please enter valid url");
                return false;
            }
            return $("#upload-form").submit();
        }
    );
});