Javascript JSON.Parse method fails on clean json data - syntax error unexpected token -

i have js file contains json nodes. file read program, string, , run json.parse on it:

var client = new xmlhttprequest(); client.open('get', 'data/data.js');  //when file has been loaded, execute  client.onreadystatechange = function()  {     if(client.responsetext != "")     {         scantext(client.responsetext);     } } function scantext(text) {     var json;     try     {         var cleanedtext = text;         cleanedtext = cleanedtext.replace('var', '');         cleanedtext = cleanedtext.replace('arrayname', '');         cleanedtext = cleanedtext.replace('=','')          alert(cleanedtext);         json = json.parse(cleanedtext);  //issue happens here         alert('try');     }     catch (ex)     {         alert(ex);     }    } 

my datafile looks like:

[  { aollname:'yui678', contract:'123-33' }, { tollname:'yui678', contract:'123-33' } ] 

i error 'syntax error: unexpected token a', comes first node aollname.

why cant json.parse method run on input?

your file not contain valid json.

json keys must quoted, , string values must use double quotes. because might execute valid javascript object, not mean valid json (the data interchange format).

[     {         "aollname": "yui678",         "contract": "123-33"     },     {         "tollname": "yui678",         "contract": "123-33"     } ] 

would valid.