[OpenLayers-Users] adding points on the given coordinates

[wrap map]

Senario, i have a lon-lat value and i want to draw a point on that value, i
had tried the following code to draw point;

function createPoint() {
    //create your point with your values
    newpoint = new OpenLayers.DFeature.Vector(
               new OpenLayers.Geometry.Point(
                (document.getElementById('longval').value,
document.getElementById('latval').value)
        )
    );
    //add point to layer
    vector.addFeatures(features);
}



the error is "features", what is the error and how can i solve this problem.
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