moving a object to x position

i am new to Unity3d and Java Script - but have some experience with flash AS3

I wish to moving an object slow to x position - but if the X i >1000 then move to x800

in AS3: myObject.x += 10; if (myObject.x > 1000){ myObject.x = 800}

How i javascript??

function Update () {  

     myObject.transform.position.x += 10; 
     if (myObject.transform.position.x > 1000){ 
          myObject.transform.position.x = 800;
     }
}

You should use Mathf.Clamp(); to control object position.
ex : transform.position.x = Mathf.Clamp(transform.position.x,0,800);