js处理backspace和enter键

<script language="javascript" type="text/javascript">
    //处理键盘事件
    function doKey(e) {
        var ev = e || window.event; //获取event对象  
        var obj = ev.target || ev.srcElement; //获取事件源  
        var t = obj.type || obj.getAttribute('type'); //获取事件源类型  
        if (ev.keyCode == 8 && t != "password" && t != "text" && t != "textarea") {
            return false;
        }
        if (ev.keyCode == 13) {
            GetSearch();
            return false;
        }
    }
    //禁止后退键 作用于Firefox、Opera  
    document.onkeypress=doKey;  
    //禁止后退键  作用于IE、Chrome  
    document.onkeydown=doKey;
</script>

转载于:https://www.cnblogs.com/hanyun/archive/2012/04/25/2470263.html