class - JQuery Hide Div when Option is Selected -

When I select a specific option value, I want to hide a class of one class

  & lt; Id = "tag type" name = "type" & gt; & Lt; Option value = "type_s" & gt; Standard & lt; / Option & gt; & Lt; Option value = "type_o" & gt; Overstock & lt; / Option & gt; & Lt; Option value = "type_send" & gt; Scratch & amp; Amp; Dent & lt; / Options & gt; & Lt; Option value = "type_multi" & gt; Coefficient & lt; / Options & gt; & Lt; / Select & gt; & Lt; Div class = "multiples" gt; Stuff here & lt; / Div & gt; & Lt; Script type = "text / javascript" & gt; $ (Document) .ready (function () (if ($ ("(# $ tagtype [value = 'type_mult']"). Length) $ ("multiples"). CSS ('display', 'none') ;});    
 
 
  jQuery (document) .ready (Function () (jquery (". Multiplier"). {("(Coefficient: selected)" .val () == "type_mult") {jQuery (". Multiplier"). ();}})}} ;   
 You are binding a handler at the  On Change  event of the selected box. Whenever you select a new option in the selection box, the handler is called.  
 In Nederler,  this  refers to the selection box that removed the  on change  event.Moder of the selected option. If this value is equal to "type_mult", then you square  
 The problem with your existing code is that it will run only once; When the page is loading first, you will be able to select the code in the selected box. The changes will have to be answered, which is why you have to pair with the  on change  event Another problem is that  if  statement even if you have used your code and in  On Change  handler, enter it   because you do not see what the option is with "type_mult" selected. You're just checking to see if it's present. Since it  always  is present,  if the code inside  will always be continued, when you want to use the names of the square, then you have to keep a period in front of the class name. Will happen. Then you do not want to  $ (.x. Multiplier)  and just do not want to  $ (multiples)  (the latter  multiples  tag, which will It is not what you want)