public static String getValueFromUrl(String url, String preText, int length) {
		String urlContents = getUrlContents(url);
		int indexOf = urlContents.indexOf(preText);
		if (indexOf != -1) {
			indexOf += preText.length();
			String substring = urlContents.substring(indexOf, indexOf + length);
			return substring;
		}
		return null;
	}
public static String getValueFromUrl ( String url , String preText , int length ) { String urlContents = getUrlContents ( url ) ; int indexOf = urlContents . indexOf ( preText ) ; if ( indexOf != - 1 ) { indexOf += preText . length ( ) ; String substring = urlContents . substring ( indexOf , indexOf + length ) ; return substring ; } return null ; }
Gets the value from url based on pre-text value from the response.

@param url     the url
@param preText the pre text
@param length  the length
@return the value from url