$(document).ready(function() {
    setIframeHeight();
});

function setIframeHeight(){
    var orderIframe = document.getElementById('orderTable');
    var part1 = document.getElementsByClassName('form-box')[0].offsetHeight;
    var part2 = document.getElementsByClassName('table-head')[0].offsetHeight;
    var wholeHeight = document.body.offsetHeight;
    orderIframe.height = wholeHeight-(part1+part2);
}

设置宽高