var load_ok = false;

function init(imgbase) {
    if (document.images) {
        img_on  = new Array();
        img_off = new Array();

        // Init
        img_on['saibai']   = new Image;
        img_off['saibai']  = new Image;

        img_on['form']   = new Image;
        img_off['form']  = new Image;

        img_on['top']   = new Image;
        img_off['top']  = new Image;

	// ON Images
	img_on['saibai'].src   = imgbase + "saibai_on.gif";
	img_on['form'].src   = imgbase + "form_on.gif";
	img_on['top'].src   = imgbase + "top_on.gif";

	// OFF Images
	img_off['saibai'].src  = imgbase + "saibai_off.gif";
	img_off['form'].src  = imgbase + "form_off.gif";
	img_off['top'].src  = imgbase + "top_off.gif";

        load_ok = true;
    }
}

function imgFocus(fid) {
    if (document.images && load_ok) {
        document.images[fid].src = img_on[fid].src;
    }
}

function imgBlur(fid) {
    if (document.images && load_ok) {
        document.images[fid].src = img_off[fid].src;
    }
}