/* ******************************************************
	フォントサイズ変更用スクリプト(fontSizeChange.js)
********************************************************* */

/* *** ▼初期設定 *** */

//title属性
var defaultCss = "font_default";	//デフォルト
var cssFile1 = "font_1";			//1段階UP
var cssFile2 = "font_2";			//2段階UP
var cssFile3 = "font_3";			//3段階UP
var cssFile4 = "font_4";			//4段階UP

/* *** ▲初期設定 *** */

/* ============================================
  function: fontSizeSetCookie
  変更後の値をクッキーに書き込む
=============================================== */

function fontSizeChange(mode){
  
  //フォントサイズ拡大
  if(mode == "larger"){
  	switch(getActiveStyleSheet()){
  		case defaultCss:
  			var currentCSS = cssFile1;
  			break;
  		case cssFile1:
  			var currentCSS = cssFile2;
  			break;
  		case cssFile2:
  			var currentCSS = cssFile3;
  			break;
  		case cssFile3:
  			var currentCSS = cssFile4;
  			break;
  		case cssFile4:
  			var currentCSS = cssFile4;
  			break;
  		default:
  			var currentCSS = defaultCss;
  			break;
  	}
  //フォントサイズ縮小
  }else if( mode == "smaller" ){
    switch(getActiveStyleSheet()){
  		case defaultCss:
  			var currentCSS = defaultCss;
  			break;
  		case cssFile1:
  			var currentCSS = defaultCss;
  			break;
  		case cssFile2:
  			var currentCSS = cssFile1;
  			break;
  		case cssFile3:
  			var currentCSS = cssFile2;
  			break;
  		case cssFile4:
  			var currentCSS = cssFile3;
  			break;
  		default:
  			var currentCSS = defaultCss;
  			break;
  	}
  }

  //fontSizeを変更
  setActiveStyleSheet(currentCSS);
}