I've created a custom button to allow users to create a case from the Contact related list on the Account tab.  It works great when a user scrolls down and uses the related list.  But if you use the related list hover at the top, the new case opens up in the hover itself and them promptly disappears when you move away.

I'm looking for a way to have this work whether you are in the hover or not without having the button open in a new window.  If there any way to tell my button if it's opening up from the hover or from the bottom related list?

This is the button code:

{!REQUIRESCRIPT("/soap/ajax/19.0/connection.js")}

var records = {!GETRECORDIDS($ObjectType.Contact)}; //grabs the Contact records displayed on the search page.

var updateRecords = []; //array for holding records that this code will ultimately update

if (records[0] == null)
{ //if the button was clicked but there was no record selected
alert("Please select at least one Contact."); //alert the user that they didn't make a selection
}

else
{
//otherwise, there was a record selection

for (var a=0; a<=0; a++) { //for all records
var objContact = new sforce.SObject("Contact"); //create a new sObject for storing updated record details
objContact = records[a]; //set the Id of the selected Contact record
updateRecords.push(objContact); //add the updated record to our array

}

window.location.href= "/500/e?&def_contact_id="+updateRecords;

//window.open( "/500/e?&def_contact_id="+updateRecords,'name');


}

Thanks in advance for any help!