<pre lang="cs">var endpointOptions = { isSource:true, isTarget:true };
var div1Endpoint = jsPlumb.addEndpoint('div1', { anchor:"TopCenter" }, endpointOptions );
var div2Endpoint = jsPlumb.addEndpoint('div2', { anchor:"BottomCenter" }, endpointOptions );
jsPlumb.connect({
    source:div1Endpoint,
    target:div2Endpoint,
    connector: [ "Bezier", 175 ],
    paintStyle:{ lineWidth:5, strokeStyle:'red' }
});