Image display apparatus and control method

A control method for controlling, over a network, an image display apparatus that has a web server function using an information terminal that has a web client function, the method comprising:

• transmitting, from the information terminal to the image display apparatus, a request signal for web screen information that controls the image display apparatus;
• selecting model data of the web screen information stored in the image display apparatus and a control item that controls the image display apparatus, based on user agent information included in the request signal;
• generating the web screen information that is capable of being displayed in the information terminal by configuring, in the model indicated by the model data, an instruction unit for instructing a control item that controls the image display apparatus;
• transmitting the web screen information generated by the image display apparatus to the information terminal;
• displaying the web screen information received by the information terminal;
• in the case where the instruction unit of the web screen information in the information terminal is specified, transmitting, to the image display apparatus, an instruction signal in accordance with the instruction unit;
• and
• controlling the control item based on the instruction signal received by the image display apparatus.