System.Web.UI.WebControls.BaseValidator.DetermineRenderUplevel C# (CSharp) Method

		protected virtual bool DetermineRenderUplevel ()
		{
			if (!EnableClientScript)
				return false;
#if TARGET_J2EE
			if (HttpContext.Current == null)
				return false;

			return (
				/* From someplace on the web: "JavaScript 1.2
				 * and later (also known as ECMAScript) has
				 * built-in support for regular
				 * expressions" */
				((Page.Request.Browser.EcmaScriptVersion.Major == 1
				  && Page.Request.Browser.EcmaScriptVersion.Minor >= 2)
				 || (Page.Request.Browser.EcmaScriptVersion.Major > 1))

				/* document.getElementById, .getAttribute,
				 * etc, are all DOM level 1.  I don't think we
				 * use anything in level 2.. */
				&& Page.Request.Browser.W3CDomVersion.Major >= 1);
#else
			return UplevelHelper.IsUplevel (
				System.Web.Configuration.HttpCapabilitiesBase.GetUserAgentForDetection (HttpContext.Current.Request));
#endif
		}