// global-navigation

	var seihin_on = new Image();
	var seihin_off = new Image();
	var atsukai_on = new Image();
	var atsukai_off = new Image();
	var ivent_on = new Image();
	var ivent_off = new Image();
	var kigyo_on = new Image();
	var kigyo_off = new Image();
	var toiawase_on = new Image();
	var toiawase_off = new Image();
	var home_on = new Image();
	var home_off = new Image();

	seihin_on.src="../images/nav-seihin-a.gif";
	seihin_off.src="../images/nav-seihin.gif";
	atsukai_on.src="../images/nav-atsukai-a.gif";
	atsukai_off.src="../images/nav-atsukai.gif";
	ivent_on.src="../images/nav-ivent-a.gif";
	ivent_off.src="../images/nav-ivent.gif";
	kigyo_on.src="../images/nav-kigyo-a.gif";
	kigyo_off.src="../images/nav-kigyo.gif";
	toiawase_on.src="../images/nav-toiawase-a.gif";
	toiawase_off.src="../images/nav-toiawase.gif";
	home_on.src="../images/nav-home-a.gif";
	home_off.src="../images/nav-home.gif";

	function rollon_s(targetimage){
		if(targetimage=="seihin_btn"){
			document.images[targetimage].src=seihin_on.src;
		}
	}

	function rolloff_s(targetimage){
		if(targetimage=="seihin_btn"){
			document.images[targetimage].src=seihin_off.src;
		}
	}

	function rollon_a(targetimage){
		if(targetimage=="atsukai_btn"){
			document.images[targetimage].src=atsukai_on.src;
		}
	}

	function rolloff_a(targetimage){
		if(targetimage=="atsukai_btn"){
			document.images[targetimage].src=atsukai_off.src;
		}
	}

	function rollon_i(targetimage){
		if(targetimage=="ivent_btn"){
			document.images[targetimage].src=ivent_on.src;
		}
	}

	function rolloff_i(targetimage){
		if(targetimage=="ivent_btn"){
			document.images[targetimage].src=ivent_off.src;
		}
	}


	function rollon_k(targetimage){
		if(targetimage=="kigyo_btn"){
			document.images[targetimage].src=kigyo_on.src;
		}
	}

	function rolloff_k(targetimage){
		if(targetimage=="kigyo_btn"){
			document.images[targetimage].src=kigyo_off.src;
		}
	}

	function rollon_t(targetimage){
		if(targetimage=="toiawase_btn"){
			document.images[targetimage].src=toiawase_on.src;
		}
	}

	function rolloff_t(targetimage){
		if(targetimage=="toiawase_btn"){
			document.images[targetimage].src=toiawase_off.src;
		}
	}

	function rollon_h(targetimage){
		if(targetimage=="home_btn"){
			document.images[targetimage].src=home_on.src;
		}
	}

	function rolloff_h(targetimage){
		if(targetimage=="home_btn"){
			document.images[targetimage].src=home_off.src;
		}
	}