Setting or getting values from html input box

Hi,

I am stuck with one very simple thing
I am tryiing to set the value of row clicked to a html text box outside the grid but it is not working
obj.onRowDoubleClicked = function(event, index){

alert(this.getRowPosition(index));
alert(this.getSelectedRows());
//document.form[0].sample.value=this.getRowPosition(index);
obj1.setControlText(this.getRowPosition(index));
alert('document.sample.value'+document.sample.value);
}
but when i created a AW input box
var obj1 = new AW.UI.Input;
obj1.setControlText("Input");
//obj1.setControlImage("search");
document.write(obj1);

with this i am able to set the cell value to AW inout box , am i missing something. Please advice