How to get Filed value on button click in Siebel Applet Browser Scripts

You can use below eScript even if there is no field defined against the control you want to get the value.

if(name == "myMethod")
{
var control, value;
control = this.FindControl("my control");
value = control.GetValue();
alert(value);
TheApplication().SetProfileAttr("MY_PA", value);
}