function ic(f) {
	
	var mx = new Number;
	var mx = 14;
	var c = new Number(document.getElementById("flg").value);


	if(f=="next") {
	
		if(c!=mx) {
		
			var cc = c + 1 ;

		} else {
		
			var cc = mx;
		}

		document.getElementById("flg").value = cc ;
		document.getElementById("mp").src = "img/main" + cc + ".jpg";
		document.getElementById("inum").src = "img/page_arrow_no_" + cc + ".gif";

	} else if (f=="back") {

		if(c!=1) {
		
			var cc = c - 1 ;
	
		} else {
	
			var cc = 1;
	
		}
	
		document.getElementById("flg").value = cc ;
		document.getElementById("mp").src = "img/main" + cc + ".jpg";
		document.getElementById("inum").src = "img/page_arrow_no_" + cc + ".gif";
	
	}
}