extjs 加载
#在application_helper.rb中def include_ext_js ext_js ="" ext_js << stylesheet_link_tag("/ext/resources/css/ext-all.css") ext_js << javascript_include_tag("/ext/adapter/ext/ext-base.js") ext_js << javascript_include_tag("/ext/ext-all.js") ext_jsend 以后用到就不用重复加载了#layouts/application.rhtml<head>....<%=include_ext_js%>....</head>
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