function Print(printTitle) {

     //var printTitle = $("#ipttitle").val();

     var legend = $("#Checkbox1").prop("checked");

     var printTask = new esri.tasks.PrintTask(printUrl);

     //打印模板

     var template = new esri.tasks.PrintTemplate();

     template.format = "JPG";

     template.label = "Portrait (Image)";

     //template.layout = "Letter ANSI A Landscape";

     template.layout = "printtemplate";//这是本人自定义的地图模板，不是arcgis系统自带的

     //获取所有图层的Id

     var arrlegend = [];

     for (var j = 0; j < map.layerIds.length; j++) {

         var layerid = "layer" + j;

         arrlegend.push({ "layerId": layerid });//根据图层id,打印对应的图例

     }

     var options = {

         scaleBarUnit: "Miles",

         legendLayers: arrlegend,

         titleText: printTitle

     };

     if (!legend) {

         options.legendLayers = [];//图例数组为空时，不打印图例

     }

     template.layoutOptions = options;

     //打印参数

     var params = new esri.tasks.PrintParameters();

     params.map = map;

     params.template = template;

     printTask.execute(params, printResult,printError);

 }

 function printError(error) {

     var error = error;

     $("#btnPrint").removeAttr("disabled");

 }

 function printResult(result) {

     $("#btnPrint").removeAttr("disabled");

     var url = result.url;

     var str = "<br/>" + "<a href='" + url + "' target='_blank'>打印输出</a>";

     $("#PrintResult").html(str);

 }