iframeSetHeight.js

var lastHeight = 0, curHeight = 0, iframe = $('.recaptchaFrame');
iframe = iframe[0];
setInterval(function(){
    // for lwciframe.style.height = iframe.contentWindow.document.body.scrollHeight + 'px';
    curHeight = $frame.contents().find('body').height();
    if ( curHeight != lastHeight ) {
        $frame.css('height', (lastHeight = curHeight) + 'px' );
    }
},500);