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testing, adding, and removing classes from an html element

/ Published in: JavaScript
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  1. function cssRegex(c) {
  2. 	return new RegExp('(?:\\s|^)' + c + '(?:\\s|$)');
  3. }
  4.  
  5. function hasClass(e,c) {
  6. 	return e.className.match(cssRegex(c));
  7. }
  8.  
  9. function addClass(e,c) {
  10. 	if (!hasClass(e,c)) {
  11. 		e.className += ' '+c;
  12. 		return true;
  13. 	}
  14. 	return false;
  15. }
  16.  
  17. function removeClass(e,c) {
  18. 	if (hasClass(e,c)) {
  19. 		e.className=e.className.replace(cssRegex(c),' ');
  20. 		return true;
  21. 	}
  22. 	return false;
  23. }

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