js控制光标到指定节点位置

js控制光标到指定节点位置(适用于富文本编辑器中)

function placeCaretAtEnd(el) {    //传入光标要去的jq节点对象
    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();
    }
}