arcgis server - Zooming into a particular polygon

I am getting the polygon id by doing

identifyParams.geometry = evt.mapPoint;
identifyParams.mapExtent = map.extent;
identifyTask.execute(identifyParams, function(result) { 
     var i;
     var polyId= new Array();

     for(i=0; i       polyId[i]=result[i].feature.attributes["UNIQPOLYID"];
     }

I want to zoom in to the polygon when the value of i is 1. How will I zoom in to that particular polygon?

Answer

You need to get the geometry of the feature, and then zoom to it's extent.

I would use a function like this:

function ZoomTofeature(feature){
//get the geometry of the feature

var shape=feature.geometry;
//check if geometry is polygon
    if(shape.type==='polygon'){
        //get extent
        var featureExtent=shape.getExtent();
        //now zoom to this extent
            map.setExtent(featureExtent);
    }else{
        //not a polygon
        alert("Shape is not a polygon");

    }

}