/**
  * Generates HTML <span></span> tags, inserts content, and adds any passed attributes
  * usage: echo EEH_HTML::span( 'this is some inline text' );
  *
  * @param string $content - inserted after opening tag, and appends closing tag, otherwise tag is left open
  * @param string $id - html id attribute
  * @param string $class - html class attribute
  * @param string $style - html style attribute for applying inline styles
  * @param string $other_attributes - additional attributes like "colspan", inline JS, "rel" tags, etc
  * @return string
  */
 public static function strong($content = '', $id = '', $class = '', $style = '', $other_attributes = '')
 {
     return EEH_HTML::_inline_tag('strong', $content, $id, $class, $style, $other_attributes);
 }