jquery validation: prevent form submit

You may try this (Example):

$(function(){
    $("#myform").validate();    
    $("#myform").on('submit', function(e) {
        var isvalid = $("#myform").valid();
        if (isvalid) {
            e.preventDefault();
            alert(getvalues("myform"));
        }
    });
});

function getvalues(f)
{
    var form=$("#"+f);
    var str="";
    $("input:not('input:submit')", form).each(function(i){
        str+='\n'+$(this).prop('name')+': '+$(this).val();
    });
    return str;
}