urgent help on javascript

I assume you have written code in Parent window like 

var objValue = window.showModalDialog ("page2.aspx")

Note: You can get the values in objValue from the Dialog window using window.returnValue.

In the page2.aspx on clcik of button call Javascript function to assign the textbox value to window.returnValue.
like:
function UpdateParent(){
  window.returnvalue = "HERE I BE"
window.close ;
}

Please do refer the following,

Let’s say the Parent window named as TestParentForm and the text box we wanted to pass the value from the child window is named as “txtParentName”. We just the call the parent widow as opener.  Form the child window (TestChildForm) we can access the parent form’s object as follows,

opener.document.TestParentForm.txtParentName


The value for this object can be assigned like this

opener.document.TestParentForm.txtParentName.value="ABC";

We will try to make it interactive so we will assign this to a value entered by the user. Then we will use one input box in child window and name it as txtChildName. So we can pass the value of the input box of child window to the parent window input box by this line.

opener.document.TestParentForm. txtParentName.value = document.TestChildForm.txtChildName.value;

We will keep this line inside a function and call this function on click of a button. Inside the function after executing the above line we will add the code to close the child window. Like this, 


opener.document.TestParentForm. txtParentName.value = document.TestChildForm.txtChildName.value;
self.close();