参考にさせていただき function func() { var args = new Array(); args[0] = window; args[1] = document.f1.a.value; x=args[1]; x = new Number(x); var url = "4.php?a="+x; var result = showModalDialog(url,window, "resizable:no; status:1; scroll:1;dialogHeight:400px;dialogWidth:500px");