how to access a window variable from a popup window?

I already lost some hours trying to figure out how to solve a javascript problem. I have a JS function that opens a popup window:

function openSearchWindow(searchType, targetIdField, targetDescField)

and I set 2 properties to this new window:

var win = window.open(searchPage, searchType + "search", style);
win.targetIdField = targetIdField;
win.targetDescField = targetDescField;

Until here, everything works perfectly. In my popup window, however, I need to access these two variables I set previously: win.targetIdField and win.targetDescField

How can I access them? I tried almost everything.

EDIT - In time,

In the popup window I have a search engine actually. When user clicks in a result, there is a JS function that gets the ID and DESCRIPTION of the selected item and passes it back to the "opener" 开发者_运维百科window, placing them in the targetIdField and targetDescField, respectively.

EDIT (2)

Once the search is performed in the popup (through a servlet) the popup's URL changes, but it's always within the same domain.

Thanks in advance.

Lucas.

Have you tried accessing them through window.targetIdField? If thait does not work, you could bind the 2 properties on the parent window (using window.targetIdField instead of win.targetIdField) and then access those from your opened window using window.opener.targetFieldid.

I suggest tou use setAttribute and getAttribute, since this is supported by every browser (that I know of).

//Setting the properties (in the parent window)
win.setAttribute('targetIdField', targetIdField);
win.setAttribute('targetDescField', targetDescField);

//Accessing the properties (in the pop-up window)
window.getAttribute('targetIdField'); //you might need to use lowercase letters...
//If that doesn't work you can try multiple things
this.getAttribute...

win.contentWindow will give you access to the new window object.

Then you can use:

win.contentWindow.targetIdField = targetIdField;
win.contentWindow.targetDescField = targetDescField;

To set targetIdField and targetDescField variables for your new popup's window object.

Note that cross-window access is restricted to the same domain.

Accessing a variable from parent window/opener window can be done by window.opener.yourVariableName