javascript return false form onclick not working -


I've done this one million times to prevent the button from going on, return the wrong from onclick but for some reason, this One button on one page in this form ... it ignores it 

  submit input type "" onclick = "return false;" Value = "copy" name = "btnCopy" id = "btnCopy9" & gt;   
 I have also taken a javascript function from here, so it really lies on itself. However, this button is submitting the form. Why can not I stop it? Any ideas?  
 I do not see anything particularly strange about this button. I hope this is staring in my face and I am not seeing it.   
 
 
  type = "submit"   
 this The reason is that he is submitting the form.

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