edumenuImgPath = 'img/';

phmenuimgname = new Array("to_prd_f2.jpg","to_soft_f2.jpg","main_prd_f2.jpg","main_soft_f2.jpg");

phmenuloadimg = new Array();

for(i=0; i<phmenuimgname.length; i++){
	phmenuloadimg[i] = new Image();
	phmenuloadimg[i].src = edumenuImgPath + phmenuimgname[i];
}


function edumenuChImgUp(edumenuID){
	document.images[edumenuID].src = edumenuImgPath + edumenuID + '_f2.jpg';
}

function edumenuChImgOut(edumenuID){
	document.images[edumenuID].src = edumenuImgPath + edumenuID + '.jpg';
}