浏览器页面查找功能（按Ctrl + F）对插件的影响 about fixedthead HOT 1 OPEN

   function buildHTML_head(configs) {
	var wrap = configs.wrapper.find('div.fixed-thead-head');
	var headTable = cloneTable(configs.table, 'head'),
			$tbody = $("tbody", headTable).empty(); // removes body content from cloned table

	if (wrap.length == 0) {
		wrap = $('<div class="fixed-thead-head"></div>');			
		configs.bodyWrap.before(wrap.append(headTable));
	} else {
		wrap.empty().append(headTable);  // empty()一下释放内存
	}
	return wrap;
   }