check boxes by default.

git-svn-id: http://svn.openlayers.org/trunk/openlayers@4224 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

tests/run-tests.html

@@ -145,6 +145,8 @@ Test.AnotherWay._add_test_page_url=function( test_url, convention )
 	cell_child=document.createElement( "input" );
 	cell_child.type="checkbox";
 	cell_child.id="checkbox"+index;
+    cell_child.checked='checked';
+    cell_child.defaultChecked='checked';
 	cell.appendChild( cell_child );
 
 	cell=row.insertCell( -1 );