js实现网页局部打印

①jquery版本打印

使用插件jquery.PrintArea.js

示例

<input type="button" id="btnPrint" value="打印"/>
<div id="printContent">要打印的内容区域<div>

<script type="text/javascript">
$(function(){
        $("btnPrint").click(function(){ $("printContent").printArea(); });
});
</script>

<input type="button" id="btnPrint" value="打印"/>
<div id="printContent">要打印的内容区域<div>

<script type="text/javascript">
$(function(){
        $("btnPrint").click(function(){ $("printContent").printArea(); });
});
</script>

 

②js打印

function preview(oper)
{
   if (oper < 10){
       bdhtml=window.document.body.innerHTML;//获取当前页的html代码
       sprnstr="<!--startprint"+oper+"-->";//设置打印开始区域
       eprnstr="<!--endprint"+oper+"-->";//设置打印结束区域
       prnhtml=bdhtml.substring(bdhtml.indexOf(sprnstr)+18); //从开始代码向后取html

       prnhtml=prnhtml.substring(0,prnhtml.indexOf(eprnstr));//从结束代码向前取html
       window.document.body.innerHTML=prnhtml;
       window.print();
       window.document.body.innerHTML=bdhtml;


   } else {
       window.print();
   }

}

function preview(oper)
{
   if (oper < 10){
       bdhtml=window.document.body.innerHTML;//获取当前页的html代码
       sprnstr="<!--startprint"+oper+"-->";//设置打印开始区域
       eprnstr="<!--endprint"+oper+"-->";//设置打印结束区域
       prnhtml=bdhtml.substring(bdhtml.indexOf(sprnstr)+18); //从开始代码向后取html

       prnhtml=prnhtml.substring(0,prnhtml.indexOf(eprnstr));//从结束代码向前取html
       window.document.body.innerHTML=prnhtml;
       window.print();
       window.document.body.innerHTML=bdhtml;


   } else {
       window.print();
   }

}

   将页面内要打印的内容加入中间<!--startprint1-->XXXXX<!--endprint1-->
    再加个打印按纽 onclick=preview（1）

 

以下为jquery.PrintArea.js的代码

 

(function ($) {
    var printAreaCount = 0;
    $.fn.printArea = function () {
        var ele = $(this);
        var idPrefix = "printArea_";
        removePrintArea(idPrefix + printAreaCount);
        printAreaCount++;
        var iframeId = idPrefix + printAreaCount;
        var iframeStyle = 'position:absolute;width:0px;height:0px;left:-500px;top:-500px;';
        iframe = document.createElement('IFRAME');
        $(iframe).attr({
            style: iframeStyle,
            id: iframeId
        });
        document.body.appendChild(iframe);
        var doc = iframe.contentWindow.document;
        $(document).find("link").filter(function () {
            return $(this).attr("rel").toLowerCase() == "stylesheet";
        }).each(
                function () {
                    doc.write('<link type="text/css" rel="stylesheet" href="'
                            + $(this).attr("href") + '" >');
                });
        doc.write('<div class="' + $(ele).attr("class") + '">' + $(ele).html()
                + '</div>');
        doc.close();
        var frameWindow = iframe.contentWindow;
        frameWindow.close();
        frameWindow.focus();
        frameWindow.print();
    }
    var removePrintArea = function (id) {
        $("iframe#" + id).remove();
    };
})(jQuery);

(function ($) {
    var printAreaCount = 0;
    $.fn.printArea = function () {
        var ele = $(this);
        var idPrefix = "printArea_";
        removePrintArea(idPrefix + printAreaCount);
        printAreaCount++;
        var iframeId = idPrefix + printAreaCount;
        var iframeStyle = 'position:absolute;width:0px;height:0px;left:-500px;top:-500px;';
        iframe = document.createElement('IFRAME');
        $(iframe).attr({
            style: iframeStyle,
            id: iframeId
        });
        document.body.appendChild(iframe);
        var doc = iframe.contentWindow.document;
        $(document).find("link").filter(function () {
            return $(this).attr("rel").toLowerCase() == "stylesheet";
        }).each(
                function () {
                    doc.write('<link type="text/css" rel="stylesheet" href="'
                            + $(this).attr("href") + '" >');
                });
        doc.write('<div class="' + $(ele).attr("class") + '">' + $(ele).html()
                + '</div>');
        doc.close();
        var frameWindow = iframe.contentWindow;
        frameWindow.close();
        frameWindow.focus();
        frameWindow.print();
    }
    var removePrintArea = function (id) {
        $("iframe#" + id).remove();
    };
})(jQuery);