javascript动态生成树形菜单的方法

//========================================//Envrionment to hold Listeners//========================================tv_listeners = new Array() ;function listener( type , handler )  { this.type = type ; this.handler = handler ; this.id = tv_listeners.length ; tv_listeners[ tv_listeners.length ] = this ;}function addListener( type , handler ) {  new listener( type , handler ) ;  }//=== END =====//=========================================// Hold the top item//=========================================tv_topnodeitem = null ;//===== END =======//=========================================//Hold nodeitems , and supply a nodeitem Register//=========================================nodeitems = new Array() ;function nodeitemRegister( obj )  {  nodeitems[ nodeitems.length ] = obj ; return nodeitems.length - 1 ;}//=== END =======//=================================//Custom a stack//Class     : stack//metheds  : get()//          put( obj )//=================================function stack() {  this.value = new Array() ; this.cursor = 0 ;}function stack_get() {   this.cursor = this.cursor - 1 ; return this.value[ this.cursor ] ;}function stack_put( obj )  {   this.value[ this.cursor ] = obj ;   this.cursor = this.cursor + 1 ;}stack.prototype.get = stack_get ;stack.prototype.put = stack_put ;//=======END ==========//=========================================// Define a public stack//=========================================userstack = new stack() ;//====== END ===========//=========================================//Image List//=========================================treeview_box_0_none = "../images/4_clos.gif" ;treeview_box_0_line = "../images/4_none.gif" ;treeview_box_2_open = "../images/2_open.gif" ;treeview_box_2_none = "../images/2_none.gif" ;treeview_box_2_close = "../images/2_clos.gif" ;treeview_box_1_open = "../images/3_open.gif" ;treeview_box_1_none = "../images/3_none.gif" ;treeview_box_1_close = "../images/3_clos.gif" ;//===============================================//Class : nodeitem//status------------------------1:two-direction    0:nobox    0: disactivite//               2:three-0direction   1:close-box  1: activite//                          2:open-box//===============================================function nodeitem( parentkey , key , lable , img ) {  this.lable = lable ; this.key = key ;  this.parent = findNode( parentkey ) ; if( this.parent != null ) {   aa = this.parent.status ;   if( aa.substring( 1 , 2 ) == "0" )     this.parent.status = aa.substring( 0 , 1 ) + "1" + aa.substring( 2 , 3 ) ;   if( this.parent.maxsubitem != null )      this.parent.maxsubitem.status = "2" + this.parent.maxsubitem.status.substring( 1 , 3 ) ;    this.parent.subitems[ this.parent.subitems.length ] = this ;    this.parent.maxsubitem = this ;   }  else {   if( tv_topnodeitem != null )  {    alert( "不能有两个顶项!" ) ;  return ;    }    tv_topnodeitem = this ;  } this.img = img ; this.tag = null ;  this.status = "100" ; this.subitems = new Array() ; this.maxsubitem = null ;  this.id = nodeitemRegister( this ) ; //********************** this.questionId = 0; this.description = ""; //this.url = null; //********************** //added by msb for the sort and move up/down /*if ( this == tv_topnodeitem ) { this.nodeIndex = 0; } else { this.nodeIndex = this.parent.subitems.length; }*/ //end added}//added by msb for the sort and move up/downfunction nodeitem_moveUp() { if (this == tv_topnodeitem) return; //topitem ssubitems = this.parent.subitems; for ( i=0; i<ssubitems.length; i++ ) { if( ssubitems[i] == this ) {  break; } } if (i==0) return; ssubitems[i] = ssubitems[i-1]; ssubitems[i-1] = this; if (i==ssubitems.length-1) { ssubitems[i-1].status = "2" + ssubitems[i-1].status.substring(1, 3); ssubitems[i].status = "1" + ssubitems[i].status.substring(1, 3); } /* itemTemp = this; ssubitems[this.nodeIndex-1] *//* for ( i=0; i<ssubitems.length; i++ ) { if( ssubitems[i] != null && ssubitems[i].nodeIndex == (this.nodeIndex-1) )  previousitem = ssubitems[i] } previousitem.nodeIndex = this.nodeIndex; this.nodeIndex = this.nodeIndex -1; swap(this,previousitem);*/ //label_on_click(this.id); this.parent.refresh(); lable_on_click(this.id);}//moveUp()function nodeitem_moveDown() { if (this == tv_topnodeitem) return; //topitem ssubitems = this.parent.subitems; for ( i=0; i<ssubitems.length; i++ ) { if( ssubitems[i] == this ) {  break; } } if (i==ssubitems.length-1) return; ssubitems[i] = ssubitems[i+1]; ssubitems[i+1] = this; if (i==ssubitems.length-2) { ssubitems[i+1].status = "1" + ssubitems[i+1].status.substring(1, 3); ssubitems[i].status = "2" + ssubitems[i].status.substring(1, 3); } this.parent.refresh(); lable_on_click(this.id);}//moveDown()/*function swap (item1, item2) { nodeitems[item1.id] = item2; nodeitems[item2.id] = item1; idTemp = item1.id; item1.id = item2.id; item2.id = idTemp;}*///end addedfunction nodeitem_setTag( obj ) {  this.tag = obj ;}function nodeitem_getTag() {  return this.tag ;}function nodeitem_show() { str = "<span id = 'preface" + this.id + "'><table border='0' cellspacing='0' cellpadding='0'><tr><td>" ;  str_f = "" ;  for( j = this.parent ; j != null ; j = j.parent ) {   if( j.status.substring( 0 , 1 ) == 1 )   str_f = "<img src = '" + treeview_box_0_none + "' align='absmiddle'>" + str_f ;    else   str_f = "<img src = '" + treeview_box_0_line + "' align='absmiddle'>" + str_f ;  }  str = str + str_f ;  str += "<img id = 'box" + this.id + "' nodeid = '" + this.id + "' src = '" ;  switch( this.status.substring( 0 , 2 ) )  {    case "10" : str += treeview_box_1_none ; break ;    case "11" : str += treeview_box_1_close ; break ;    case "12" : str += treeview_box_1_open ; break ;    case "20" : str += treeview_box_2_none ; break ;    case "21" : str += treeview_box_2_close ; break ;    case "22" : str += treeview_box_2_open ; break ;  }  str += "' align='absmiddle' onclick='box_on_click(this)'>" ;  if( this.img == "" )   str += this.img ;  else   str += "<img src = '" + this.img + "' align='absmiddle' width='16' height='16'>" ;  str += "</td><td><table border='0' cellspacing='1' cellpadding='1' style='font-size:9pt; color:#333333' id='lablePanel" + this.id + "'><tr><td ondblclick = 'lable_on_dblclick(" + this.id + ")' onclick='lable_on_click(" + this.id + ")' style='cursor:hand' id='f_lablePanel" + this.id + "' nowrap>" + this.lable + "</td></tr></table></td></tr></table>" ;  str += "</span><span id = 'tv_panel_" + this.id + "' style='display:" ; if( this.status.substring( 1 , 2 ) == '2' )  str += "" ; else  str += "none" ;  str += "'></span>" ; if( this.parent == null )    for(var i in document.all){     if (document.all[i].tagName == "BODY")     {    document.all[i].insertAdjacentHTML( "AfterBegin" , str ) ;       break     }    } else   document.all( "tv_panel_" + this.parent.id ).insertAdjacentHTML( "BeforeEnd" , str ) ;  for( m = 0 ; m < this.subitems.length ; m ++ )   if( this.subitems[ m ] != null ) {   userstack.put( m ) ;   this.subitems[ m ].show() ;   m = userstack.get() ;  }}function nodeitem_refresh() { str = "<table border='0' cellspacing='0' cellpadding='0'><tr><td>" ;  str_f = "" ;  for( j = this.parent ; j != null ; j = j.parent ) {   if( j.status.substring( 0 , 1 ) == 1 )   str_f = "<img src = '" + treeview_box_0_none + "' align='absmiddle'>" + str_f ;    else   str_f = "<img src = '" + treeview_box_0_line + "' align='absmiddle'>" + str_f ;  } str = str + str_f ;  str += "<img id = 'box" + this.id + "' nodeid = '" + this.id + "' src = '" ;  switch( this.status.substring( 0 , 2 ) )  {     case "10" : str += treeview_box_1_none ; break ;     case "11" : str += treeview_box_1_close ; break ;     case "12" : str += treeview_box_1_open ; break ;     case "20" : str += treeview_box_2_none ; break ;     case "21" : str += treeview_box_2_close ; break ;     case "22" : str += treeview_box_2_open ; break ;  }  str += "' align='absmiddle' onclick='box_on_click(this)'>" ;  if( this.img == "" )   str += this.img ;  else   str += "<img src = '" + this.img + "' align='absmiddle' width='16' height='16'>" ;  str += "</td><td><table border='0' cellspacing='1' cellpadding='1' style='font-size:9pt; color:#333333' id='lablePanel" + this.id + "'><tr><td ondblclick = 'lable_on_dblclick(" + this.id + ")' onclick='lable_on_click(" + this.id + ")' style='cursor:hand' id='f_lablePanel" + this.id + "' nowrap>" + this.lable + "</td></tr></table></td></tr></table>" ;  document.all( "preface" + this.id ).innerHTML = str ;  document.all( "tv_panel_" + this.id ).innerHTML = "" ; for( m = 0 ; m < this.subitems.length ; m ++ )  if( this.subitems[ m ] != null ) {   userstack.put( m ) ;   this.subitems[ m ].show() ;   m = userstack.get() ;    }}function nodeitem_remove() {  pparent = this.parent ; if( pparent == null )  {    removenodeitem( this.id ) ;    for(var i in document.all){      if (document.all[i].tagName == "BODY")       {   document.all[i].innerHTML = "" ;        break       }     } return ; } lastsubitem = null ; for( i = 0 ; i < pparent.subitems.length ; i ++ )  if( pparent.subitems[ i ] != null )    if ( pparent.subitems[ i ] == this )      pparent.subitems[ i ] = null ;      else     lastsubitem = pparent.subitems[ i ] ;  pparent.maxsubitem = lastsubitem ;  if( lastsubitem == null )      pparent.status = pparent.status.substring( 0 , 1 ) + "0" + pparent.status.substring( 2 , 3 ) ;  else     pparent.maxsubitem.status = "1" + pparent.maxsubitem.status.substring( 1 , 3 ) ;   removenodeitem( this.id ) ; //added by msb for move up/down arrTemp = new Array(); j = 0; for ( i=0; i<pparent.subitems.length; i++ ) { if ( pparent.subitems[i] != null ) {  arrTemp[j] = pparent.subitems[i];  j++; } } this.parent.subitems = arrTemp; //end added pparent.refresh() ; //tv_topnodeitem.refresh() ;}function removenodeitem( id )  {  curitem = nodeitems[ id ] ; nodeitems[ id ] = null ; for( m = 0 ; m < curitem.subitems.length ; m ++ )    if( curitem.subitems[ m ] != null )  {   userstack.put( m ) ;   removenodeitem( curitem.subitems[ m ].id ) ;   m = userstack.get() ;    }}function nodeitem_boxclick() {   if( this.status.substring( 1 ,2 ) == "0" )    return ;  if( this.status.substring( 1 ,2 ) == "1" )      this.open() ; else     this.close() ;}function nodeitem_close() {   this.status = this.status.substring( 0 , 1 ) + "1" + this.status.substring( 2 , 3 ) ;   document.all( "tv_panel_" + this.id ).style.display = "none" ;   eval( "document.all( 'box' + this.id ).src = treeview_box_" + this.status.substring( 0 , 1 ) +"_close" ) ;}function nodeitem_open() {   this.status = this.status.substring( 0 , 1 ) + "2" + this.status.substring( 2 , 3 ) ;   document.all( "tv_panel_" + this.id ).style.display = "" ;   eval( "document.all( 'box' + this.id ).src = treeview_box_" + this.status.substring( 0 , 1 ) +"_open" ) ;}//added by msb for the move up/downnodeitem.prototype.moveUp = nodeitem_moveUp;nodeitem.prototype.moveDown = nodeitem_moveDown;//end addednodeitem.prototype.show = nodeitem_show ;nodeitem.prototype.refresh = nodeitem_refresh ;nodeitem.prototype.boxclick = nodeitem_boxclick ;nodeitem.prototype.close = nodeitem_close ;nodeitem.prototype.open = nodeitem_open ;nodeitem.prototype.remove = nodeitem_remove ;nodeitem.prototype.setTag = nodeitem_setTag ;nodeitem.prototype.getTag = nodeitem_getTag ;//==========================================================// Public Methods//==========================================================function showTV() {   tv_topnodeitem.show() ;}function findNode( key )  { pppp = null;  for( i = 0 ; i < nodeitems.length ; i ++ ) {  if( nodeitems[ i ] != null ) {    if( nodeitems[ i ].key == key ) {     pppp = nodeitems[ i ] ;  }  } }  return pppp ;}function addNode( parentkey , key , lable , img )  {  return new nodeitem( parentkey , key , lable , img ) ;}function deleteNode( key )  {  curNode = findNode( key ) ; if( curNode == null )  return false ;  curNode.remove() ;   return true ;}//====== END ================//===========================================================// Events//===========================================================function box_on_click( obj ) {  nodeitems[ obj.nodeid ].boxclick() ;}tv_curlable = null ;tv_curlable_f = null ;function lable_on_click( id ) {    key = nodeitems[ id ].key ;    if( nodeitems[ id ].parent == null )    parentkey = "" ;    else    parentkey = nodeitems[ id ].parent.key ;  if( tv_curlable != null ) {   tv_curlable.bgColor = "transparent" ;   tv_curlable.style.color = "#333333" ;   tv_curlable_f.bgColor = "transparent" ;    }    tv_curlable = document.all("lablePanel"+id) ;   tv_curlable.bgColor = "#000000" ;   tv_curlable.style.color = "#FFFFFF" ;    tv_curlable_f = document.all("f_lablePanel"+id) ;   tv_curlable_f.bgColor = "#888888" ;  for( i = 0 ; i < tv_listeners.length ; i ++ )     if( tv_listeners[ i ].type == "click" ) {   h = tv_listeners[ i ].handler ;   eval( h + "( '" + key + "' , '" + parentkey + "' ) ; " ) ;       }}function lable_on_dblclick( id ) { key = nodeitems[ id ].key ;    if( nodeitems[ id ].parent == null )    parentkey = "" ;    else    parentkey = nodeitems[ id ].parent.key ;  if( tv_curlable != null ) {   tv_curlable.bgColor = "transparent" ;   tv_curlable.style.color = "#333333" ;   tv_curlable_f.bgColor = "transparent" ;    }    tv_curlable = document.all("lablePanel"+id) ;   tv_curlable.bgColor = "#000000" ;   tv_curlable.style.color = "#FFFFFF" ;    tv_curlable_f = document.all("f_lablePanel"+id) ;   tv_curlable_f.bgColor = "#888888" ;  for( i = 0 ; i < tv_listeners.length ; i ++ )     if( tv_listeners[ i ].type == "dblclick" ) {   h = tv_listeners[ i ].handler ;   eval( h + "( '" + key + "' , '" + parentkey + "' ) ; " ) ;       }}

<script language="javascript"><!-- addNode(-1,0,"hehe","../images/top.gif"); addNode(0,1,"haha","../images/top.gif"); addNode(0,2,"haha","../images/top.gif"); addNode(1,3,"haha","../images/top.gif"); addNode(1,4,"haha","../images/top.gif"); addNode(2,5,"haha","../images/top.gif"); addNode(2,6,"haha","../images/top.gif"); showTV();--></script>