回车替换Tab 并不会 提交表单 IE Chrome 通过

网上一堆可以回车替换tab的代码,可是基本都忽略谷歌浏览器的兼容性,找了3个小时 试了无数遍,终于总结出这一段代码,希望能帮到需要的同学,也给自己留个备忘
        document.onkeydown=function(evt)
        {
            var isie = (document.all) ? true : false;
            var key;
            var srcobj;
            // if the agent is an IE browser, it's easy to do this.
            if (isie) {
                key = event.keyCode;
                srcobj=event.srcElement;
            }
            else {
                key = evt.which;
                srcobj=evt.target;
            } 
           if(key==13 && srcobj.type!='button' && srcobj.type!='submit' &&srcobj.type!='reset' && srcobj.type!='textarea' && srcobj.type!='') {
                if(isie)
                    event.keyCode=9;
                else {
                    var el=getNextElement(evt.target);
                    if (el.type!='hidden')
                        ;   //nothing to do here.
                    else
                        while(el.type=='hidden')
                            el=getNextElement(el);
                    if(!el)
                        return false;
                    else
                        el.focus();

　　　　　　　//把提交按钮retrun 为false
                    return false;
                }
            }
        }
 
        function getNextElement(field) {
            var form = field.form;
            for(var e = 0; e < form.elements.length; e++) {
                if (field == form.elements[e])
                    break;
            }
            return form.elements[++e % form.elements.length];
        }

用了好一段时间才整理出来的,要转载的童鞋记得保留我的链接哦http://www.cnblogs.com/linyijia/p/3457974.html