W3speedster Customize Image

Function:	w3SpeedsterCustomizeImage
Description:	Customize image tags.
Parameter:	$img = Image tag with all attributes $imgnn = Modified image tag by plugin $imgnn_arr = Image tag attributes array
Return:	$imgnn- Customized image tags

function w3SpeedsterCustomizeImage($imgnn,$img,$imgnn_arr){
	if(strpos($imgnn,'alt') != false){
		$imgnn = str_replace('alt=""','alt="value"',$imgnn);
	}
	return $imgnn;
}

function w3SpeedsterCustomizeImage($imgnn,$img,$imgnn_arr){
	if(strpos($imgnn,'alt') != false){
		$imgnn = str_replace('alt=""','alt="value"',$imgnn);
	}
	return $imgnn;
}