看过很多导出下载的方式，大都是弹出新窗口下载，我倒是一直用iframe来模拟加载新窗口，从而达到下载文件的目的。

下面是最近用extjs时，也是用到的iframe来模拟无弹窗下载

if(exportForm.getForm().isValid()) {var winobj = Ext.getCmp("exportpopwin");if(winobj) {winobj.destroy();}varstartDate, startTime, endDate, endTime;startDate= new Date(Ext.getCmp("exportstartdate").getValue()).format("Y-m-d");startTime= Ext.getCmp("exportstarttime").getValue();endDate= new Date(Ext.getCmp("exportenddate").getValue()).format("Y-m-d");endTime= Ext.getCmp("exportendtime").getValue();vartargetWin;switch(dataType) {case 0:targetWin= newExt.Window({id:"exportpopwin",layout:"fit",width:0,height:0,html:"Exporting...<iframe scrolling='auto' frameborder='0' width='1px' height='1px' src='export.aspx?dt=0&sd=" + startDate + "&st=" + startTime + "&ed=" + endDate + "&et=" + endTime + "'></iframe>"});break;case 1:targetWin= newExt.Window({id:"exportpopwin",layout:"fit",width:0,height:0,html:"Exporting...<iframe scrolling='auto' frameborder='0' width='1px' height='1px' src='export.aspx?dt=1&sd=" + startDate + "&st=" + startTime + "&ed=" + endDate + "&et=" + endTime + "'></iframe>"});break;}targetWin.show();targetWin.setVisible(false); //targetWin.toBack();//这个方式把导出窗口隐藏到条件窗口的后面也可以}