Adding handling of Search Button for the jsPrompt

framework/src/com/phonegap/DroidGap.java

@@ -950,6 +950,18 @@ public class DroidGap extends PhonegapActivity {
 						result.cancel();
 					}
 				});
+            dlg.setOnKeyListener(new DialogInterface.OnKeyListener() {
+            	//DO NOTHING
+				public boolean onKey(DialogInterface dialog, int keyCode, KeyEvent event) {
+					if(keyCode == KeyEvent.KEYCODE_BACK)
+					{
+						result.cancel();
+						return false;
+					}
+					else
+						return true;
+				}
+			});
             dlg.create();
             dlg.show();
             return true;