function font_size_change(size_mode){

	var cookie_data , cs , ce , default_fontsize = 100 , textsize , font_size_change_id = "font-size-mode";

	cookie_data = document.cookie;
	cs = cookie_data.indexOf("textsize=");
	ce = cookie_data.indexOf(";", cs);
	if (ce==-1)ce=cookie_data.length;

	if (size_mode == 'default' && cs != -1) size_mode = cookie_data.substring(cs + 9, ce);

	var i , j;

	for (i=0;i<=2;i++){
		document.getElementById(font_size_change_id).getElementsByTagName('img').item(i).src = "/images/btn_font_size0" + (i + 1) + ".gif";
	}

	switch (size_mode){
		case 'large': j = 2; textsize= 120; break;
		case 'middle': j = 1; textsize= 100; break;
		case 'small': j = 0; textsize= 80; break;
		default : textsize = default_fontsize; j = 1; break;
	}

	document.getElementById(font_size_change_id).getElementsByTagName('img').item(j).src = "/images/btn_font_size0" + (j + 1) + "on.gif";
	document.body.style.fontSize = textsize + "%";
	document.cookie = "textsize=" + size_mode + "; domain=www.hokkaido-365.com ; path=/;";

}

MM_preloadImages("/images/gmenu_img01on.gif","/images/gmenu_img02on.gif","/images/gmenu_img03on.gif","/images/gmenu_img04on.gif","/images/gmenu_img05on.gif","/images/gmenu_img06on.gif","/images/gmenu_img07on.gif");

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}