How to use external JS libraries in LoadRunner?How to use external JS libraries in LoadRunner

Suppose i have below js library  function "prefix0"

function prefix0(str){
if ((str.toString()).length==1){
return "0" str.toString();

}
else{
return str;}
}

 

how to use this function as external JS library in loadrunner  ?

 

Thnaks in advance,

Chinnikrishna.