Typeerror:swfuploadify is undefined

The browser does not have a flash plugin installed.

$ (function () {  
    $ ("#file_upload"). Uploadify ({
    		' method '   : ' Post ',
            ' height ': +,  
            ' swf ': ' ${ctx}/ Static/js/uploadify/uploadify.swf ',  
            ' uploader ': ' ${ctx}/ajax/file_add ',  
            ' width ': +,
            ' auto ': false,
            ' FormData ': {
            	
            },
            ' filetypeexts ': ' *.jpg;*.jpge;*.gif;*.pgn ',
            ' queuesizelimit ': ' Ten ',
            ' Fileobjname ': ' file ',//controller variable name
            ' Onfallback ': function () {//flash cannot load Error
                alert ("You cannot upload the Flash control without installing it.) Please install the Flash control and try again. ");
            },
            ' Onuploaderror ': function (file,errorcode,errormsg) {//Upload failed
                alert (file.name+" Upload failed, </br > Error message: "+errormsg")
                
            ,
            ' onuploadsuccess ': function (file, data, response) {  
                alert (File.name + ') was successfully uploaded. ');  
            }  
        });
    
});