line = 4;
mes = new Array(4);
mes[0] ='<img src="http://www.tmc-jinji.com/topimage1.jpg" img alt="˜J�Еی¯�A�A‹Æ‹K‘¥�AŒo‰cŽx‰‡‚ÌŽ–‚È‚ç“È–ØŒ§TMCƒOƒ‹�[ƒv">';
mes[1] ='<img src="http://www.tmc-jinji.com/topimage2.jpg" img alt="˜J�Еی¯�A�A‹Æ‹K‘¥�AŒo‰cŽx‰‡‚ÌŽ–‚È‚ç“È–ØŒ§TMCƒOƒ‹�[ƒv">';
mes[2] ='<img src="http://www.tmc-jinji.com/topimage3.jpg" img alt="˜J�Еی¯�A�A‹Æ‹K‘¥�AŒo‰cŽx‰‡‚ÌŽ–‚È‚ç“È–ØŒ§TMCƒOƒ‹�[ƒv">';
mes[3] ='<img src="http://www.tmc-jinji.com/topimage4.jpg" img alt="˜J�Еی¯�A�A‹Æ‹K‘¥�AŒo‰cŽx‰‡‚ÌŽ–‚È‚ç“È–ØŒ§TMCƒOƒ‹�[ƒv">';
Rnd = Math.floor(Math.random()*line);
document.write(mes[Rnd]);