**1. Iterate over all the controls in the plane **The function findControlAll ()       {               Var inputs = document. GetElementsByTagName (” input ”);               For (j = 0; J< Inputs. Length; J++)                   If (inputs[j]. Type ==“text”             {                          Inputs [j]. Value = "";       // empty the text box               }   } **Traverses the control   in the specified container; **The function findControl ()       {               // table1 below refers to traversing the controls in the table               Var inputs = document. GetElementById (” table1 ”). The getElementsByTagName (” input ”);               For (var I = 0; I< Inputs. Length; I++)               {                       Inputs [I]. Type ==“text”)// as above, the type of control and the action to be done can be filled in as needed                       {                               Inputs [I] value = "";                       }               }           }

**Gets the parent container object **

<div >
<input type="button" value=" Gets the parent container object " onclick="CheckBoxAll(this)"/>
</div>
function CheckBoxAll(e){
//ParentNode  Is to get the parent property
var obj = e.parentNode.parentNode.parentNode.getElementsByTagName("*");}