Question

js如何设置打印时是横打还是纵打？

在网上搜了一下，如下：（其中各种属性是什么意思）
）<script defer>
function SetPrintSettings() {
// -- advanced features
factory.printing.SetMarginMeasure(2) // measure margins in inches
factory.SetPageRange(false, 1, 3) // need pages from 1 to 3
factory.printing.printer = "HP DeskJet 870C"
factory.printing.copies = 2
factory.printing.collate = true
factory.printing.paperSize = "A4"
factory.printing.paperSource = "Manual feed"

// -- basic features
factory.printing.header = "This is MeadCo"
factory.printing.footer = "Advanced Printing by ScriptX"
factory.printing.portrait = false
factory.printing.leftMargin = 1.0
factory.printing.topMargin = 1.0
factory.printing.rightMargin = 1.0
factory.printing.bottomMargin = 1.0
}

Answer 1

factory.printing.header = "This is MeadCo" //页眉
factory.printing.footer = "Advanced Printing by ScriptX" //页脚
factory.printing.portrait = true //true为纵向打印，flase为横向打印
factory.printing.leftMargin = 1.0//左页边距
factory.printing.topMargin =1. 0 //上页边距
factory.printing.rightMargin = 1.0 //右页边距
factory.printing.bottomMargin = 1.0 //下页边距

其他的不要设置，请注意，第三个属性为横向

Answer 2

这个是利用ScriptX的代码。需要下载ScriptX并安装。
就是通过ActiveX的调用，来实现相关的打印设置，
设置横打/纵打的那句，你那段里没有，
factory.printing.portrait = true; //--纵--
factory.printing.portrait = false; //--横--
ActiveX仅仅是在IE下，其它浏览器就不行了。
Chrome浏览器可用以下CSS代码实现：
@page{
size: landscape;
}