var load_ok = false;

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

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

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

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

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

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

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

	img_on['icon01']   = new Image;
	img_off['icon01']  = new Image;

	img_on['icon02']   = new Image;
	img_off['icon02']  = new Image;

	img_on['icon03']   = new Image;
	img_off['icon03']  = new Image;

	img_on['icon05']   = new Image;
	img_off['icon05']  = new Image;

	img_on['icon06']   = new Image;
	img_off['icon06']  = new Image;


	// ON Images
	img_on['b_his'].src   = imgbase + "b_his_on.gif";
	img_on['b_phi'].src   = imgbase + "b_phi_on.gif";
	img_on['b_cui'].src   = imgbase + "b_cui_on.gif";
	img_on['b_col'].src   = imgbase + "b_col_on.gif";
	img_on['b_ohg'].src   = imgbase + "b_ohg_on.gif";
	img_on['top'].src   = imgbase + "top_on.gif";
	img_on['icon01'].src   = imgbase + "icon_on.gif";
	img_on['icon02'].src   = imgbase + "icon_on.gif";
	img_on['icon03'].src   = imgbase + "icon_on.gif";
	img_on['icon05'].src   = imgbase + "icon_on.gif";
	img_on['icon06'].src   = imgbase + "icon_on.gif";

	// OFF Images
	img_off['b_his'].src  = imgbase + "b_his_of.gif";
	img_off['b_phi'].src   = imgbase + "b_phi_of.gif";
	img_off['b_cui'].src  = imgbase + "b_cui_of.gif";
	img_off['b_col'].src  = imgbase + "b_col_of.gif";
	img_off['b_ohg'].src  = imgbase + "b_ohg_of.gif";
	img_off['top'].src  = imgbase + "top_of.gif";
	img_off['icon01'].src  = imgbase + "icon_of.gif";
	img_off['icon02'].src  = imgbase + "icon_of.gif";
	img_off['icon03'].src  = imgbase + "icon_of.gif";
	img_off['icon05'].src  = imgbase + "icon_of.gif";
	img_off['icon06'].src  = imgbase + "icon_of.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;
    }
}