js实现节点（div）名称编辑

节点html代码如下：

<div class="img_1" id="img_1" >     <input type="image" class="img_1" src="img/cump.png"></input>     <div class="noteText" id="noteTxt" type="text" ondblclick ="changeName(this.id);">123</div></div>

js编辑noteTxt文本，function如下：

     function changeName(noteTxtId){        var noteTxt = document.getElementById(noteTxtId);        noteTxt.style.display= "none";//.style.display= "block"         var div = noteTxt.parentNode;        if(!document.getElementById("noteInput")){            var text=document.createElement("input");            text.type="text";            text.id="noteInput";            text.style.width=getStyle(noteTxt,'width');            text.style.height=getStyle(noteTxt,'height');            text.style.marginTop=getStyle(noteTxt,'marginTop');            text.style.textAlign=getStyle(noteTxt,'textAlign');            text.value=noteTxt.innerHTML;            div.appendChild(text);            text.select();            text.onblur=function(){                noteTxt.style.display= "block";                noteTxt.innerHTML=text.value;                //text.style.display= "none";                div.removeChild(text);        }        }     }     //获得CSS文件中的样式     function getStyle(obj, attr)     {        if(obj.currentStyle)           {        return obj.currentStyle[attr];  //IE        }else{                       return getComputedStyle(obj,false)[attr];  //FF     }     }

css如下：

.img_1 {      width: 80px;    height:70px;    position:absolute;    }.noteText {    width:80px;    height:15px;    text-align:center;    margin-top:70px;    Word-break:break-all; }