DOM 总结

   /***************json****************/
   var strjson = "[";
   
   for(var i=0;i<abbrs.length;i++)
   {
        var abbr = abbrs[i];
        var title = abbr.getAttribute("title");
        alert("nodeValue:"+abbr.firstChild.nodeValue+"  "+"nodeName:"+abbr.firstChild.nodeName+"nodeType:"+abbr.firstChild.nodeType);
        var text = abbr.firstChild.nodeValue;
        strjson += "{title:'"+ title +"',text:'"+ text +"'},";
   }
   strjson = strjson.substring(0,strjson.length-1);
   strjson += "]";
   var obj = eval("("+ strjson +")");
    /****************json***************/

前台格式保存JSON格式

function preparePlaceholder() {
    var placeholder = document.createElement("img"); //创建一个对象
    placeholder.setAttribute("id","placeholder");//添加属性
    placeholder.setAttribute("src","images/placeholder.gif");
    placeholder.setAttribute("alt","my image gallery");
   
    var desc = document.createElement("p");
    desc.setAttribute("id","desc");
   
    var desc_text = document.createTextNode("Choose an image");//Text
    desc.appendChild(desc_text);//text添加到desc里<div id=desc>Choose an image</div>
   
    var gallery = document.getElementById("imagegallery");
    insertAfter(desc,gallery);
    insertAfter(placeholder,desc);
}

//elements 不包括 label
//input textarea fieldset
//elements表单中所有控件的集合。input type=image 对象不在此集合内
function resetFields(whichform) {
   for(var i=0;i<whichform.elements.length;i++){
      var ele = whichform.elements[i];
      if(ele.type == "submit") continue;
      if(!ele.defaultValue) continue;
      ele.onfocus = function(){
        if(this.value == this.defaultValue){
            this.value = "";}
      }
      ele.onblur = function(){
        if(this.value == ""){
            this.value = this.defaultValue;}
      }
   }
}

function prepareInternalnav() {
    var nav = document.getElementById("internalnav");
    links = nav.getElementsByTagName("a");
    for (var i=0; i<links.length; i++ ){
        var sid = links[i].getAttribute("href").split("#")[1];
        if (!document.getElementById(sid)) continue;
        document.getElementById(sid).style.display = "none";
        links[i].id = sid;//分别赋值 links[i].XX 可以随便定义
        links[i].onclick = function(){
            showSection(this.id); //事件里当前对象(links[i])用 this
            return false;
        }
    }
}