div,contenteditable编辑器之ctrl+enter换行，enter发送

 　　　　//回车发消息

        $scope.keyDownSend = function ($event) {

            var keycode = window.event?$event.keyCode:$event.which;

            var evt = $event || window.event;

            var inputTxt = document.getElementById("contentText");

            // 回车-->发送消息

            if(keycode==13 && !(evt.ctrlKey)){

                sendMessage();

                $event.preventDefault();

                return false;

            }

            // ctrl+回车-->换行

            if (evt.ctrlKey && evt.keyCode == 13) {

                var #contenText = $('#contenText');

                #contenText_opt.html(#contenText_opt.html() + '<br>');

                placeCaretAtEnd(#contenText.get(0));

                return false;

            }

function placeCaretAtEnd(el) {

            el.focus();

            if (typeof window.getSelection != "undefined"

                && typeof document.createRange != "undefined") {

                var range = document.createRange();

                range.selectNodeContents(el);

                range.collapse(false);

                var sel = window.getSelection();

                sel.removeAllRanges();

                sel.addRange(range);

            }

            else if (typeof document.body.createTextRange != "undefined") {

                var textRange = document.body.createTextRange();

                textRange.moveToElementText(el);

                textRange.collapse(false);

                textRange.select();

            }

        }

//发消息

        $scope.send_test = function($event) {

            var contet = $('#contenText').html().replace(/&nbsp;/g, ' ').replace(/&amp;/g, '&');

            if($($event.target).hasClass('on')){

                sendErrorTipsMsg(contet);

                sendMessageTxt();

            } else if (!contet){

                sendErrorTipsMsg(ErrorContent);

            }

            //发送消息后清除类

            $($event.target).removeClass('current');

        };