code: public static HtmlTree INPUT(String type, String id) {
          HtmlTree htmltree = new HtmlTree(HtmlTag.INPUT);
          htmltree.addAttr(HtmlAttr.TYPE, nullCheck(type));
          htmltree.addAttr(HtmlAttr.ID, nullCheck(id));
          htmltree.addAttr(HtmlAttr.VALUE, " ");
          htmltree.addAttr(HtmlAttr.DISABLED, "disabled");
          return htmltree;
      }
docs: Generates a INPUT tag with some id.
  
  @param type the type of input
  @param id id for the tag
  @return an HtmlTree object for the INPUT tag