jquery - What is the fn in the snippet -


i looking @ jquery watermark plugin , cant seem understand whats going on... first off fn mean , watermarkcolor being defined...ins not in file

$.fn.watermark = function(text,color) {     if(!color)         color="#2d2d2d";     return this.each(         function(){                  var input=$(this);             var defaultcolor=input.css("color");             map[map.length]={text:text,obj:input,defaultcolor:defaultcolor,watermarkcolor:color};             function clearmessage(){                 if(input.val()==text)                     input.val("");                 input.css("color",defaultcolor);             }

fn shortcut prototype jquery sets up. watermarkcolor whatever color entered watermark function, or defaults #2d2d2d.


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