Redmine

First sorry for my bad English.
Hi guys i look like idiot but i am new about website designing. I have several customers, i am making some money besides my job. I am interesting about detecting mobile device on my website. I am hosting my web page with go daddy. I all ready have com and mobi site upload. I look at true lots of things about detecting mobile device but i am not really understanding how its work because i don't know how to write codes. I make some changes on the codes but i am not professional. So i am hoping some one give some source code i can upload to my server or some what? Please help if i do have lot off money i would be offer but unfortunately i don't have a lot of money but in the end if its works i would be more happy to give some money.Thank you to all your help.