JS实现树形复选框级联选中

源码：

 1 function getTreeSiblings(id){

 2     var tr = $("#"+id);

 3     var pId = tr.attr("pId");

 4     var siblings = [];

 5     if(pId != undefined){

 6         $("tr").each(function(i, ele) {

 7             tr = $(ele);

 8             if(tr.attr("pId") == pId){

 9                 siblings.push($(this));

10             }

11         });

12     }

13     return siblings;

14 }

15 function getTreeParent(id){

16     var tr = $("#"+id);

17     var parents = [];

18     parents.push(tr);

19 

20     var pId = tr.attr("pId");

21     if(pId != undefined){parents = parents.concat(getTreeParent(pId));}

22     return parents;

23 }        

24 function getTreeChildren(id){

25     var tr = null;

26     var children = [];

27     if(id != undefined){

28         $("tr").each(function(i, ele) {

29             tr = $(ele);

30             if(tr.attr("pId") == id){

31                 children.push(tr);

32                 children = children.concat(getTreeChildren(tr.find("input:eq(0)").val()));

33             }

34         });

35     }

36     return children;

37 }

38 function chkNode(obj) {

39     var id = obj.value, chkbox = null;

40     $.each(getTreeChildren(id), function(i,v){

41         v.find("input:eq(0)").attr("checked", function(){return obj.checked ? "checked":""});

42     });

43     $.each(getTreeParent(id), function(i,v){

44         if(i > 0){

45             chkbox = v.find("input:eq(0)");

46             chkbox.attr("checked", function(){return getTreeChildrenChecked(chkbox.val()) ? "checked":""});

47         }

48     });

49 }

50 function getTreeChildrenChecked(id){

51     var chked = false;

52     $.each(getTreeChildren(id), function(i,v){

53         chked = v.find("input:eq(0)").attr("checked") == true;

54         if(chked) {return false;}

55     });

56     return chked;

57 }