说明: 1.js代码 MyGridView=Ext.extend(Ext.grid.GridView,{ renderHeaders : function(){ var cm = this.cm, ts = this.templates; var ct = ts.hcell,ct2=ts.mhcell; var cb = [], sb = [], p = {},mcb=[]; for(var i = 0, len = cm.getColumnCount(); i < len; i++){ p.i
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