///////////////////////////////////////////////////////////////////////
//  MENU BUTTON
///////////////////////////////////////////////////////////////////////
if(document.images){
	HeadBtnOFF=new Array();
	HeadBtnON =new Array();

	HeadBtnOFF[0]=new Image();HeadBtnOFF[0].src='images/head_keyword_off.gif';
	HeadBtnON[0] =new Image();HeadBtnON[0].src ='images/head_keyword_on.gif';

	HeadBtnOFF[1]=new Image();HeadBtnOFF[1].src='images/head_access_off.gif';
	HeadBtnON[1] =new Image();HeadBtnON[1].src ='images/head_access_on.gif';

	HeadBtnOFF[2]=new Image();HeadBtnOFF[2].src='images/head_kougaku_off.gif';
	HeadBtnON[2] =new Image();HeadBtnON[2].src ='images/head_kougaku_on.gif';

	HeadBtnOFF[3]=new Image();HeadBtnOFF[3].src='images/head_lng_jp_off.gif';
	HeadBtnON[3] =new Image();HeadBtnON[3].src ='images/head_lng_jp_on.gif';

	HeadBtnOFF[4]=new Image();HeadBtnOFF[4].src='images/head_lng_en_off.gif';
	HeadBtnON[4] =new Image();HeadBtnON[4].src ='images/head_lng_en_on.gif';
}
function HeadBtn_Over(n){document.images["HeadBtn"+n].src=HeadBtnON[n].src;}
function HeadBtn_Out(n){ document.images["HeadBtn"+n].src=HeadBtnOFF[n].src;}