當javascript操作dom樹時，經常會遇到增加和刪除節點的情況，今天就讓錯新技術頻道小編為大家簡單介紹許愿墻中用到的函數，一起進入下文了解一下吧！

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function?ssdel(){
if?(event)
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lObj?=?event.srcElement?;

while?(lObj?&&?lObj.tagName?!=?"DIV")?lObj?=?lObj.parentElement?;
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var?id=lObj.id
?????document.getElementById(id).removeNode(true);
?????//document.getElementById(id).outerHTML="";//
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var?Obj=''
var?index=10000;//z-index;
document.onmouseup=MUp
document.onmousemove=MMove

function?MDown(Object){
Obj=Object.id
document.all(Obj).setCapture()
pX=event.x-document.all(Obj).style.pixelLeft;
pY=event.y-document.all(Obj).style.pixelTop;
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function?MMove(){
if(Obj!=''){
?document.all(Obj).style.left=event.x-pX;
?document.all(Obj).style.top=event.y-pY;
?}
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function?MUp(){
if(Obj!=''){
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?Obj='';
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function?setTagBPic(i)?{
????picurl?=?getBPic(i);
????getObj('tagBPic').style.background?=?"?transparent?url(/""?+?picurl?+?"/")?no-repeat?scroll?bottom?left";
????cf.tagbgpic.value?=?i;
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function?setTagBColor(i)?{
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????getObj('preview').style.background?=?''?+?color;
????cf.tagbgcolor.value?=?i;
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function?getBPic(i)?{
????i?=?(i<1?||?i>8)?1:i;
????return?"images/pic"?+?parseInt(parseInt(i)+27)?+".gif";
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//獲得焦點;
function?getFocus(obj)
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???????if(obj.style.zIndex!=index)
???????{
???????????????index?=?index?+?2;
???????????????var?idx?=?index;
???????????????obj.style.zIndex=idx;
???????????????//obj.nextSibling.style.zIndex=idx-1;
???????}
}