example:

the html code for notin is

∉

Code Name: notin
Character: ∉
Unicode Code Point (Decimal): U+2209 (8713)
Standard: HTML 4.0
DTD: HTMLsymbol
Old ISO Subnet: ISOtech
Description: not an element of

You can use this notin html code to customize your profiles like your myspace facebook hi5 friendster twitter and all other social network sites this is how you can put notin symbols on your web page. what else besides not an element of do you want to know the html code?