本文实例讲述了javascript动态生成树形菜单的方法。分享给大家供大家参考,具体如下:
//========================================//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-direction0:nobox0: disactivite// 2:three-0direction 1:close-box1: 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 += "" ; elsestr += "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 = "" ;elseparentkey = 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 = "" ;elseparentkey = 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 + "" ) ; " ) ; }}javascript调用
<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>
希望本文所述对大家JavaScript程序设计有所帮助。