Inserts a new element after an existing element, which belongs to the general function InsertAfter (newelement,targetelement)

Function insertafter (newelement,targetelement) {                   //inserts a new element behind an existing element, which is a general-purpose function var parent =  Targetelement.parentnode;if (parent.lastchild == targetelement) {parent.appendchild (newElement);} Else{parent.insertbefore (newelement,targetelement.nextsibling);}} Function preparegallery ()  {                             //traversal array if (! document.getElementsByTagName)  return false;if (!document.getelementbyid)  return false;if (! document.getelementsbytagname| |! document.getElementById)  { return false;}   var gallery = document.getelementbyid ("Imagegallery");  var links =  gallery.getelementsbytagname ("a");  for ( var i=0; i < links. length; i++)  { links[i].onclick = function () { return !showpic (this);  } links[i].onkeypress = links[i].onclick; }}

Inserts a new element after an existing element, which belongs to the general function InsertAfter (newelement,targetelement)