Browser compatibility issues in IE compatibility mode SCRIPT1028: Missing identifiers, strings, or numbers

Directly on the code:

The previous code was not modified

var ajaxpost = function (url,data,callback) {
$.ajax ({
Type: ' POST ',
Url:url,
Data: {"Data":d ATA},
DataType: ' JSON ',
Success:function (data) {
if (data.success = = True) {
if (callback! = undefined) {
Callback (Data.data);
}
}else{
Alert ("Execution failed");
}
       },
});
};

affect the cause of this error, I marked out in red, Firefox, Google Browser can be passed by default, ie not.

var ajaxpost = function (url,data,callback) {
$.ajax ({
Type: ' POST ',
Url:url,
Data: {"Data":d ATA},
DataType: ' JSON ',
Success:function (data) {
if (data.success = = True) {
if (callback! = undefined) {
Callback (Data.data);
}
}else{
Alert ("Execution failed");
}
       }
});
};

Just remove the comma.

Browser compatibility issues in IE compatibility mode SCRIPT1028: Missing identifiers, strings, or numbers