How to make the layer visible on and off

hi, experts

 

this script:

 

        var docs = app.documents;

             (var = docs.length-1; >= 0; i--) {

                    docs[i].layers.item("chi").visible = true;

                    docs[i].layers.item("chi").locked = false;

                    docs[i].layers.item("eng").visible = false;

                    docs[i].layers.item("eng").locked = true;

                     }

      alert("done.")

 

but how can make layer

1. if layer "chi" visible = true; while "eng" visible = false

"chi" locked = false; while "eng" locked = true

just turn the

layer "chi" visible = false; while "eng" visible = true 

"chi" locked = true; while "eng" locked = false

 

just 2 layer switch;

 

regard

john

try this,

 

var docs = app.documents; (var = docs.length-1; >= 0; i--) {     if(docs[i].layers.item("chi").visible == true && docs[i].layers.item("chi").locked == false)     {         docs[i].layers.item("chi").visible = false;         docs[i].layers.item("chi").locked = true;         docs[i].layers.item("eng").visible = true;         docs[i].layers.item("eng").locked = false;     }     else if(docs[i].layers.item("eng").visible == true && docs[i].layers.item("eng").locked == false)     {         docs[i].layers.item("chi").visible = true;         docs[i].layers.item("chi").locked = false;         docs[i].layers.item("eng").visible = false;         docs[i].layers.item("eng").locked = true;     } } alert("done.") 

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