javascript change input value

1document.getElementById("myInputID").value = "My Value"; //set value on myInputID

1var inputValue = document.getElementById("myTextInputID").value;
2

1document.getElementById("ID").value = "Tamer Jarrar"; 
2

1document.getElementById("yourInputID").style.color = 'the color of your choice';

1function updateInput(ish){
2    document.getElementById("fieldname").value = ish;
3}