/* font-size.change.js
* 
* http://www.kchnet.or.jp/hdc/cardiovascular/common/fontsize.html
* with jQuery
* edit 2011/03/28 B'sStudio Miyazaki
*/
uaName = navigator.userAgent;
appName = navigator.appVersion;

var fontSizeUnit = "em";

var perOrder = 0.2;

var defaultSize = 1;

var ckName = "YokohamaMinamiKyosai Hospital";

var ckDays = 2;

var ckPath = "/"

var fsCK = GetCookie(ckName);

if ( fsCK == null ) {
  currentSize = defaultSize;
}
else{
  currentSize = Number(fsCK);
}

function fscRef(){

  if (( document.layers )||(( appName.indexOf("Mac",0) != -1 ) && ( uaName.indexOf("MSIE 4.0",0) != -1 ))){
    return false;
  }

  else if( document.body ){
  
    //document.body.style.fontSize = currentSize + fontSizeUnit;
				var qrt = currentSize + fontSizeUnit;
				$('#main').css({fontSize: qrt});
  }
  
}

// _______________________________________ end of function fscRef() ___ 

function fsc( CMD ){

  if( CMD == "larger" ){
    var newSize = Number( currentSize + perOrder );
    SetCookie( ckName , newSize );
  }

  if( CMD == "smaller" ){
    if ( currentSize != perOrder ){
      var newSize = Number( currentSize - perOrder );
      SetCookie( ckName , newSize );
    }
    else{
      var newSize=Number(currentSize);
    }
  }

  if( CMD == "default" ){
    var newSize = defaultSize;
    DeleteCookie( ckName );
  }

  if( document.layers ){
    window.alert( "" );
    return false;
  }

  else if(( appName.indexOf("Mac",0) != -1 ) && ( uaName.indexOf("MSIE 4.0",0) != -1)){
    window.alert( "Sorry! MacIE4.0 is not supported." );
    return false;
  }

  else{
  currentSize = newSize;

  fscRef();
  }
}

// _______________________________________ end of function fsc() ___ 

function SetCookie(name,value){
  var dobj = new Date();
  dobj.setTime( dobj.getTime() + 24 * 60 * 60 * ckDays * 1000);
  var expiryDate = dobj.toGMTString();
  document.cookie = name + '=' + escape(value)+ ';expires=' + expiryDate + ';path=' + ckPath;
}

function GetCookie (name){
  var arg  = name + "=";
  var alen = arg.length;
  var clen = document.cookie.length;
  var i = 0;
  while (i < clen){
    var j = i + alen;
    if (document.cookie.substring(i, j) == arg)
    return getCookieVal (j);
    i = document.cookie.indexOf(" ", i) + 1;
    if (i == 0) break;
  }
   return null;
}

function getCookieVal (offset){
  var endstr = document.cookie.indexOf (";", offset);
  if (endstr == -1)
  endstr = document.cookie.length;
  return unescape(document.cookie.substring(offset,endstr));
}

function DeleteCookie(name){
  if (GetCookie(name)) {
    document.cookie = name + '=' +
    '; expires=Thu, 01-Jan-70 00:00:01 GMT;path='+ckPath;
  }
}

//EOF