<script language="JavaScript"><!-- myMsg = "いらっしゃいませ　こんにちは！　　　　"; myMsg = myMsg + myMsg; myCnt = 0; myChar = "あ"; myApp = myChar.length; function myFunc(){ document.myForm.myFormMes.value = myMsg.substring( myCnt , myMsg.length ); myCnt = ( myCnt == (myMsg.length/2)-myApp ) ? 0 : myCnt+myApp; setTimeout( "myFunc()" , 200 ); } // --></script> <form name="myForm"><p> <input type="text" size="30" name="myFormMes"> <script language="JavaScript"><!-- myFunc(); // --></script> </p></form>