function navigation(i){
switch(i)
	{
		case 1 : open( "/intro/salutatory.asp",target="_self"); 
		break;	
		case 2 : open( "/sshboard/list.asp?BBID=8",target="_self"); 
		break;	
		case 3 : open( "/course/course_intro.asp",target="_self"); 
		break;
		case 4 : open( "/booking/booking_guide.asp",target="_self"); 
		break;
		case 5 : open( "/customer/question.asp",target="_self"); 
		break;
		case "index": open( "/index.asp",target="_self");
		break;
	}
}