How to batch modify layer names in PS using JS_javascript skills

#target photoshopapp.bringToFront();
if (documents. length == 0) {
alert("No document to process");
} else {
var visibility = false;
var docRef = activeDocument;
var layers = docRef. layers;
if (layers.length == 1 && docRef.activeLayer.isBackgroundLayer == 1) {
alert("The Background layer can not be hidden when it is the only layer in a document.");
} else {
for (var i = 0; i < layers.length; i ) {
var tempName = "name" i;//Modified name
layers[i] .name = tempName;
}
}

}