HTTP Binding Motion detection for Reolink IP camera

Add-ons Bindings
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So i make an item this way

String MotionTest "Current Channel [%s]" { http="<http://192.168.178.36/api.cgi?cmd=GetMdState&user=admin&password=123456:1000:JS(getValue.js)]" }

but i am not good in javascript, need your help how do i parse it inside the getValue.js ?