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Source Code

# File action_view/helpers/url_helper.rb, line 473
def method_javascript_function(method, url = '', href = nil)
  action = (href && url.size > 0) ? "'#{url}'" : 'this.href'
  submit_function =
    "var f = document.createElement('form'); f.style.display = 'none'; " +
    "this.parentNode.appendChild(f); f.method = 'POST'; f.action = #{action};"

  unless method == :post
    submit_function << "var m = document.createElement('input'); m.setAttribute('type', 'hidden'); "
    submit_function << "m.setAttribute('name', '_method'); m.setAttribute('value', '#{method}'); f.appendChild(m);"
  end

  if protect_against_forgery?
    submit_function << "var s = document.createElement('input'); s.setAttribute('type', 'hidden'); "
    submit_function << "s.setAttribute('name', '#{request_forgery_protection_token}'); s.setAttribute('value', '#{escape_javascript form_authenticity_token}'); f.appendChild(s);"
  end
  submit_function << "f.submit();"
end