/* Table Of Contents
--------------------------------------------------
	
	last-updated: 2006.7;
	
	・Swap Image
	・Mouse Over
	・Mouse Out
	・Menu Visible
	・Menu Hidden
	
--------------------------------------------------*/

/* Swap Image
--------------------------------------------------*/
function imgread() {
	secnav = new Array("suppo", "tech", "link", "past", "site");
	buttonImg = new Array();

	for(var cnt=0; cnt<=secnav.length; cnt++){
		if(secnav[cnt]!=""){
			buttonImg[secnav[cnt]] = new Image();
			buttonImg[secnav[cnt]].src ="../images/" + secnav[cnt] + "_on.gif";
		}
	}
}

/* Mouse Over
--------------------------------------------------*/
function imageOn(id){
	document.images['nav_'+id].src = buttonImg[id].src;
}

/* Mouse Out
--------------------------------------------------*/
function imageOff(id){
	document.images['nav_'+id].src ="../images/" + id + "_off.gif";
}


/* Menu Visible
--------------------------------------------------*/
function showMenu(menuObj) {
	document.getElementById('popup_menu').style.display = "";
	document.getElementById(menuObj).style.visibility = 'visible';
}

/* Menu Hidden
--------------------------------------------------*/
function hideMenu(menuObj) {
	document.getElementById(menuObj).style.visibility = 'hidden';
}