code: @Override
  	public int doStartTag() throws JspException {
  
  		String string = null;
  		Boolean bool = null;
  		if (getBase64Expr() != null
  				&& (bool = EvalHelper.evalBoolean("base64", getBase64Expr(), this, pageContext)) != null) {
  			setBase64(bool);
  		}
  
  		if (getSrcExpr() != null
  				&& (string = EvalHelper.evalString("srcExpr", getSrcExpr(), this, pageContext)) != null) {
  
  			setSrc(string);
  		}
  
  		return super.doStartTag();
  	}
docs: /*
  (non-Javadoc)
  
  @see net.jawr.web.taglib.AbstractResourceBundleTag#doStartTag()