Unknown Identifier (more information within)

var tm : TextMesh = gameObject.GetComponent(Texto);

function Update () { if(worldone.drawit == true) { tm.text = "WORLDONE"; } }

This is the code i am working with, and the error points to "Texto". My 3DText GameObject is called Texto and i have linked both that and the script together. I have tried putting "var Texto:GameObject;" before var tm but this spits out another error. Any suggestions?

Thank you