Disalbe/Activate script if a key is pressed.

You cannot attach t$$anonymous$$s code to the script you want to disable because once disabled, it will no longer check for input. The way to get around t$$anonymous$$s is to make a second script that will disable the first script. T$$anonymous$$s second script will need to be somet$$anonymous$$ng like (untested code):

 var scriptToControl : nameOfScriptToControl;
 
 function Start () {
      scriptToControl = GetComponent("nameOfScriptToControl");
 }
 
 function Update() {
     if (Input.GetKeyDown(KeyCode.X)) {
           Debug.Log("User pressed X");
           if (scriptToControl.enabled)
                    scriptToControl.enabled = false;
           else
                    scriptToControl.enabled = true;
      }
 }