arcgis api for js如何调用GP服务？

function createKLJ4SoilMetal(ctx,featureLayer,divCode,array,colArray,windowId,resultLabelId) {



	var waitModalWindow = $('#'+windowId);

	waitModalWindow.html(getWaitDialogHtml('klj'));//data

	waitModalWindow.modal({show:true,backdrop:'static'}).on("hidden", function(){

    	$(this).remove();

	});



	setTimeout(function() {

		

	    if(divCode == '450000' && array.length < 100) {

	    	array = array.concat(emptyPointArray);

	    } else if(divCode.length == 6 && divCode.charAt(4) == '0' && divCode.charAt(5) == '0') {

	

	    } else if(divCode.length == 6 && (divCode.charAt(4) != '0' || divCode.charAt(5) != '0')) {

	    	

	    }

		

	    //把点位信息插入到数组中

	    var inputFeatures = [];

	    for (var i = 0; i < array.length; i++) {

	        var pt = array[i];

	        var g = pointGraphic(pt[colArray[0]], pt[colArray[1]], pt[colArray[2]]);

	        inputFeatures.push(g);

	        

	    }

	    

	    var findTask = new esri.tasks.FindTask(bouderUrl);

	    var findParams = new esri.tasks.FindParameters();

	    findParams.returnGeometry = true;

	    findParams.layerIds = [0,1,2];

	    

	    var precision = 0.01;

	    var gpServiceUrl1 = "";

	    var mapServiceUrl1 = "";

	    if(divCode == '450000') {

	    	precision = 0.02;

	        findParams.searchFields = ["上级编码"];

	    } else if(divCode.length == 6 && divCode.charAt(4) == '0' && divCode.charAt(5) == '0') {

	    	precision = 0.008;

	        findParams.searchFields = ["地市编码"];

	    } else if(divCode.length == 6 && (divCode.charAt(4) != '0' || divCode.charAt(5) != '0')) {

	    	precision = 0.005;

	    	findParams.searchFields = ["区县编码"];

	    } else {

	    	findParams.searchFields = ["乡镇编号"];

	    }

	    

    	gpServiceUrl1 = gpKrigingServiceUrl_soilmetal;

        mapServiceUrl1 = mapKrigingServiceUrl_soilmetal;

	    findParams.searchText = divCode;

	    

	    findTask.execute(findParams, function(queryResult){

	        var clipFeatures = [];

	        if (queryResult.length == 0) {

	            alert("未查询到要素！");

	            return;

	        }

	        for (var i = 0; i < queryResult.length; i++) {

	            var graphic = queryResult[i].feature;

	            clipFeatures.push(graphic);

	        }

	

	        var gp = new esri.tasks.Geoprocessor(gpServiceUrl1);

	        var clipFeatureSet = new esri.tasks.FeatureSet();

	        clipFeatureSet.features = clipFeatures;

	

	        var inputFeaturesSet = new esri.tasks.FeatureSet();

	        inputFeaturesSet.features = inputFeatures;

	

	        var params = {

	        		要素图层: clipFeatureSet,

	        		输入点要素: inputFeaturesSet,

	        		Z_值字段 : "Z",

	        		输出像元大小__2_:precision,

	            UsePolygon : true

	        };

	        

	        var krigingLayer = map.getLayer('KrigingLayer');

	        if (krigingLayer) {

	            map.removeLayer(krigingLayer);

	        }

	        

	        gp.submitJob(params, 

	        	function(result) {

		            var jobId = result.jobId;

		            var status = result.jobStatus;

		            

		            if (status === esri.tasks.JobInfo.STATUS_SUCCEEDED) {

		                var url = mapServiceUrl1 + "/jobs/" + jobId;

		                var krigingLayer = new esri.layers.ArcGISDynamicMapServiceLayer(url, {

		                    "id": "KrigingLayer"

		                });

		                map.addLayer(krigingLayer);

		                

//		                legend4Metal.refresh([{layer:krigingLayer, title:'图例'}]);

                         

//		                require([

//		                         "esri.Map", "esri/dijit/Legend", ... 

//		                       ], function(Map, Legend, ... ) {

//		                         var map = new Map( ... );

//		                         var legend = new Legend({

//		                           map: map

//		                         }, "legendDiv");

//		                         legend.startup();

//		                         ...

//		                       });

		                

		                for (var i = 0; i < featureLayer.graphics.length; i++) {

	        				var backgroundSymbol = new esri.symbol.SimpleFillSymbol(esri.symbol.SimpleFillSymbol.STYLE_SOLID,new esri.symbol.SimpleLineSymbol(esri.symbol.SimpleLineSymbol.STYLE_SOLID, new esri.Color([0,0,0]), 0.3),new esri.Color([255,255,255,0]));

		        			featureLayer.graphics[i].symbol = backgroundSymbol;

		        	  	}

		        		featureLayer.redraw();

		        		

					    waitModalWindow.find("#"+resultLabelId).html("");

					    waitModalWindow.find("#closeButton").trigger("click");

		            }

		        }, 

		        function(jobinfo) {

				    var jobstatus = '';

				    switch (jobinfo.jobStatus) {

				        case 'esriJobSubmitted':

				            jobstatus = '提交中...';

				            break;

				        case 'esriJobExecuting':

				            jobstatus = '执行中...';

				            break;

				        case 'esriJobFailed':

				            jobstatus = '执行失败';

				            break;

				        case 'esriJobSucceeded':

				            break;

				    }

				    waitModalWindow.find("#"+resultLabelId).html(jobstatus);

				    document.getElementById(resultLabelId).innerHTML = jobstatus;

				}, 

				function(error) {

					waitModalWindow.find("#"+resultLabelId).html(error);

				    document.getElementById(resultLabelId).innerHTML = error;

				}

			);

	    });

	},500);

}