simplify cross browser rating stars display

git-svn-id: http://piwigo.org/svn/trunk@12639 68402e56-0260-453c-a942-63ccdbb3a9ee

themes/default/fix-ie7.css

@@ -23,6 +23,3 @@
 	display: block;
 }
 
-INPUT[type='submit'] {
-  text-indent: 0px !important;
-}

themes/default/js/rating.js

@@ -23,10 +23,9 @@ function makeNiceRatingForm(options)
 		rateButton.initialRateValue = rateButton.value; // save it as a property
 		try { rateButton.type = "button"; } catch (e){}// avoid normal submit (use ajax); not working in IE6
 
-		if (navigator.userAgent.indexOf('AppleWebKit/')==-1 && navigator.userAgent.indexOf('MSIE 8')==-1) rateButton.value = ""; //hide the text IE<8/Opera - breaks safari
+		rateButton.value = " "; //hide the text (Apple + IE would show text above the stars)
 		with (rateButton.style)
 		{
-			textIndent = "-50px"; //hide the text FF
 			marginLeft = marginRight = 0;
 		}