Code:
javascript:
var a="https://axis.iaero.me/accinfo?username=";
var b=prompt("What is the username of the Minecraft account you would like to look up?", "Notch");
var c="&format=json";
if(b==="")
{
alert("invalid response")
}
else if(b===" ")
{
alert("invalid response");
}
else if (b!=null)
{
open(a+b+c);
}
Bookmarklet:
javascript:var a="https://axis.iaero.me/accinfo?username="; var b=prompt("What is the username of the Minecraft account you would like to look up?", "Notch"); var c="&format=json"; if(b===""){alert("invalid response")}else if(b===" "){alert("invalid response");} else if (b!=null){open(a+b+c);}