Ctrl+Enter 提交聊天信息

window.onload = function() {
var content = document.getElementById("content");
var info = document.getElementById("info");
var btn = document.getElementById("btn");

info.onkeydown = function(ev) {
var oEvent = ev || event;

if (oEvent.ctrlKey && oEvent.keyCode === 13) {
content.value += info.value + "\n";
info.value = "";
}
};

btn.onclick = function() {
content.value += info.value + "\n";
info.value = "";
};
};