问从.自动填充外部表格。另一种形式

EN

// This will get the value of the input and send it to the iFrame on the fly
$('#form-id input:not([type=submit])').each(function()  {
    var val = $(this).val();
    $(window).postMessage(val);
});

// Create browser compatible event handler.
var eventMethod = window.addEventListener ? "addEventListener" : "attachEvent";
var eventer = window[eventMethod];
var messageEvent = eventMethod == "attachEvent" ? "onmessage" : "message";

// Listen for a message from the WP page
eventer(messageEvent, function(e) {
    if (e.data.length < 1) return;

    // jQuery
    $('#input-id').val(e.data);

    // Pure JS
    document.getElementById('input-id').setAttribute('value', e.data); 
}, false);