added function to check if browser supports htmlarea / richtext editor

phpgwapi/inc/class.html.inc.php

@@ -149,6 +149,24 @@
 			return "<textarea name=\"$name\" $options>".$this->htmlspecialchars($value)."</textarea>\n";
 		}
 
+		/*!
+		@function htmlarea_avalible
+		@author ralfbecker
+		@abstract Checks if HTMLarea (or an other richtext editor) is availible for the used browser
+		*/
+		function htmlarea_availible()
+		{
+			switch($this->user_agent)
+			{
+				case 'msie':
+					return $this->ua_version >= 5.5;
+				case 'mozilla':
+					return $this->ua_version >= 1.3;
+				default:
+					return False;
+			}
+		}
+
 		/*!
 		@function htmlarea
 		@syntax htmlarea( $name,$content='',$style='width:100%; min-width:500px; height:300px;' )