i added new logo design on television manager the title is joomla_logo design_black.png as well as i transformed in defalt temple css file but it is no longer working, as well as i wish to give a suggestion form during my site it's shoud contain title descreption and email id, help, thanks ahead of time

I do not really know very well what type of joomla logo design you need to replace! If there's a joomla logo design inside your template you are able to change it out using the tamplate.css without a doubt ! Should you did not discover the logo design, or even the image, maybe there's another css file close to the template.css file.

The look you changed may be cached inside your browser. Should you right click the image you need to replace you are able to usually open the look in another tab. View it inside a new tab then refresh the page an find out if it updates. Otherwise, a minimum of you'll have the Link to the look you're changing.

For adding forms, you will find several components for creating forms in Joomla. My personal favorite is ChronoForms, but you will find several very highly ranked and examined options.

http://extensions.joomla.org/extensions/contacts-and-feedback/forms