function init(){
	var id_ary = Array( "menu_01_top", "menu_02_company", "menu_03_business", "menu_04_recruit", "menu_05_specialist", "menu_06_training", "menu_07_blog" );
	var imgObj_ary = Array();
	for( var cnt=0; id_ary.length>cnt; cnt++ ){
		imgObj_ary[cnt] = new Image();
		imgObj_ary[cnt].src = "/images/"+id_ary[cnt]+"_on.png";
	}
}

/*
function onButtton( aID ) {
	if( aID != "" ) $("#"+aID).attr("src","/images/"+aID+"_on.png");
}

function offButtton( aID ) {
	if( aID != "" ) $("#"+aID).attr("src","/images/"+aID+".png");
}
*/


function onButtton( aID ) {
	el = document.getElementById(aID);
	if(el != null){
		tmp_src = el.src.replace(aID,aID+"_on");
		if( aID != "" ) $("#"+aID).attr("src",tmp_src);
	}
}

function offButtton( aID ) {
	el = document.getElementById(aID);
	if(el != null){
		tmp_src = el.src.replace(aID+"_on",aID);
		if( aID != "" ) $("#"+aID).attr("src",tmp_src);
	}
}


function onButtton_n( aName ) {
/*	el = document.getElementsByName(aName);
	if(el != null){
		tmp_src = el.src.replace(aName,aName+"_on");
		if( aName != "" ) $("#"+aName).attr("src",tmp_src);
	} */
	img_src = $("."+aName).attr("src");
	if( aName != "" ) $("."+aName).attr("src",img_src.replace(aName,aName+"_on"))
//	$("."+aName).src.replace(aName,aName+"_on");
}

function offButtton_n( aName ) {
/*	el = document.getElementsByName(aName);
	if(el != null){
		tmp_src = el.src.replace(aName+"_on",aName);
		if( aName != "" ) $("#"+aName).attr("src",tmp_src);
	}
*/


	img_src = $("."+aName).attr("src");
	if( aName != "" ) $("."+aName).attr("src",img_src.replace(aName+"_on",aName))

}