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Ext.onReady(function() {
alert( ""extjs测试");
});
<script type="text/javascript" src="extjs/adapter/ext/ext-base.js"> </script>
<script type="text/javascript" src="extjs/ext-all.js"> </script>
<script>
var objext = new Ext()
function fn(){
("extjs测试");
}
objext.onReady(fn);
</script>