<!--       
        if (document.images) {
			img1on = new Image();          
            img1on.src = "/img/btn_patient_on.gif"; 
			img2on = new Image();          
            img2on.src = "/img/btn_medical_on.gif"; 
			img3on = new Image();          
            img3on.src = "/img/btn_meet_on.gif"; 
            img4on = new Image();          
            img4on.src = "/img/btn_about_on.gif"; 
            img5on = new Image();          
            img5on.src = "/img/btn_privacy_on.gif"; 
			img1off = new Image();          
            img1off.src = "/img/btn_patient_off.gif";  
			img2off = new Image();          
            img2off.src = "/img/btn_medical_off.gif"; 
			img3off = new Image();          
            img3off.src = "/img/btn_meet_off.gif"; 
			img4off = new Image();          
            img4off.src = "/img/btn_about_off.gif";       
			img5off = new Image();          
            img5off.src = "/img/btn_privacy_off.gif";         
        }
// Function to 'activate' images.
function imgOn(imgName) {
        if (document.images) {
            document.images[imgName].src = eval(imgName + "on.src"); 
        }
}
// Function to 'deactivate' images.
function imgOff(imgName) {
        if (document.images) {
            document.images[imgName].src = eval(imgName + "off.src");
        }
}
// -->