if (document.images) {
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	link1on = new Image(80,80);
        link1on.src = "images/m_home-over.gif";

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        link2off.src = "images/m_about.gif";

	link2on = new Image(80,80);
        link2on.src = "images/m_about-over.gif";

	link3off = new Image(80,80);
        link3off.src = "images/m_courses.gif";

	link3on = new Image(80,80);
        link3on.src = "images/m_courses-over.gif";

	link4off = new Image(80,80);
        link4off.src = "images/m_courses_a.gif";

	link4on = new Image(80,80);
        link4on.src = "images/m_courses_a-over.gif";

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        link5off.src = "images/m_courses_b.gif";

	link5on = new Image(80,80);
        link5on.src = "images/m_courses_b-over.gif";
        
	link6off = new Image(80,80);
        link6off.src = "images/m_courses_c.gif";
        
	link6on = new Image(80,80);
        link6on.src = "images/m_courses_c-over.gif";

	link7off = new Image(80,80);
        link7off.src = "images/m_courses_d.gif";

	link7on = new Image(80,80);
        link7on.src = "images/m_courses_d-over.gif";

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        link8off.src = "images/m_courses_e.gif";

	link8on = new Image(80,80);
        link8on.src = "images/m_courses_e-over.gif";

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        link9off.src = "images/m_why.gif";

	link9on = new Image(80,80);
        link9on.src = "images/m_why-over.gif";

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	link10on = new Image(80,80);
        link10on.src = "images/m_students-over.gif";

	link11off = new Image(80,80);
        link11off.src = "images/m_students_a.gif";
        
	link11on = new Image(80,80);
        link11on.src = "images/m_students_a-over.gif";

	link12off = new Image(80,80);
        link12off.src = "images/m_students_b.gif";

	link12on = new Image(80,80);
        link12on.src = "images/m_students_b-over.gif";

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        link13off.src = "images/m_other.gif";

	link13on = new Image(80,80);
        link13on.src = "images/m_other-over.gif";

	link14off = new Image(80,80);
        link14off.src = "images/m_other_a.gif";

	link14on = new Image(80,80);
        link14on.src = "images/m_other_a-over.gif";

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	link15on = new Image(80,80);
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	link16on = new Image(80,80);
        link16on.src = "images/m_other_c-over.gif";

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        link17off.src = "images/m_contact.gif";

	link17on = new Image(80,80);
        link17on.src = "images/m_contact-over.gif";

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        link18off.src = "images/m_courses_f.gif";

	link18on = new Image(80,80);
        link18on.src = "images/m_courses_f-over.gif";

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        link19off.src = "images/m_courses_g.gif";

	link19on = new Image(80,80);
        link19on.src = "images/m_courses_g-over.gif";

}

function img_act(imgName) {  
  
                imgOn = eval(imgName + "on.src");  
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} 

function img_inact(imgName) {

                imgOff = eval(imgName + "off.src");
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}