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js 打印网页指定内容

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11/29
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 function doPrint() {

         setTimeout(function() {

             bdhtml=window.document.body.innerHTML;

             sprnstr="<!--startprint-->";

             eprnstr="<!--endprint-->";

             prnhtml=bdhtml.substr(bdhtml.indexOf(sprnstr)+17);

             prnhtml=prnhtml.substring(0,prnhtml.indexOf(eprnstr));

             OpenWindow = window.open("");

             OpenWindow.document.write("<!DOCTYPE HTML><HTML><HEAD><meta http-equiv=\"Content-Type\" content=\"text\/html; charset=utf-8\" \/><TITLE>打印页<\/TITLE><link href=\"css\/com.css\" rel=\"stylesheet\" type=\"text\/css\" \/><\/HEAD><BODY><div id=\"printbox\" ><\/div><\/BODY><\/HTML>");

              OpenWindow.document.getElementById("printbox").innerHTML=prnhtml;

              OpenWindow.document.close();

              OpenWindow.print();

      }, 200);

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