JSBool JS_ExecuteScript()

JS_ExecuteScript (JSContext *cx, JSObject *obj, unsigned short *script, unsigned int sz, jsval *rval)

Method; compiles and executes a JavaScript string. If the script generates a return value, it returns in *rval.

JSContext *cx, JSObject *obj, unsigned short *script, unsigned int sz, jsval *rval

The cx argument is the opaque JSContext pointer that passes to the JavaScript function.
The obj argument is a pointer to the object in whose context the script executes. While the script is running, the this keyword is equal to this object. Usually this is the JSObject pointer that passes to the JavaScript function.
The script argument is a string that contains JavaScript code. If the string size is not specified (see the sz argument), the string must be null-terminated.
The sz argument is the size of the string, in bytes. If sz is 0, the length of the null-terminated string is computed automatically.
The rval argument is a pointer to a single jsval structure. The function's return value is stored in *rval.

A Boolean value: JS_TRUE indicates success; JS_FALSE indicates failure.