汇通财经APP讯——12月18日美市美市更新的黄金、白银、铂金、钯金、原油、天然气、铜(商品)以及：美元指数、欧元、英镑、日元、瑞郎、澳元、加元、纽元(热门货币对)的支撑阻力位一览。
element that closes the modal
var span = document.getElementsByClassName("close")[0];
// When the user clicks the button, open the modal
btn.onclick = function() {
modal.style.display = "block";
}
// When the user clicks on (x), close the modal
span.onclick = function() {
modal.style.display = "none";
}
// When the user clicks anywhere outside of the modal, close it
window.onclick = function(event) {
if (event.target == modal) {
modal.style.display = "none";
}
}