imag = new Array ()
     imag[0] = "images/patientlogin.gif"
     imag[1] = "images/patientlogin_on.gif"
     imag[2] = "images/nav/home.gif"
	 imag[3] = "images/nav/home_on.gif"
     imag[4] = "images/nav/ouroffice.gif"
     imag[5] = "images/nav/ouroffice_on.gif"
	 imag[6] = "images/nav/aboutortho.gif"
     imag[7] = "images/nav/aboutortho_on.gif"
     imag[8] = "images/nav/aboutbraces.gif"
	 imag[9] = "images/nav/aboutbraces_on.gif"
	 imag[10] = "images/nav/smilegallery.gif"
	 imag[11] = "images/nav/smilegallery_on.gif"
	 imag[12] = "images/nav/helpfullinks.gif"
	 imag[13] = "images/nav/helpfullinks_on.gif"
	 imag[14] = "images/nav/gameroom.gif"
	 imag[15] = "images/nav/gameroom_on.gif"
	 imag[16] = "images/nav/contactus.gif"
	 imag[17] = "images/nav/contactus_on.gif"
	 imag[18] = "images/officetour1.jpg"
	 imag[19] = "images/officetour1-over.jpg"




function swtch(num, imgname){
                imgname.src = im[num].src
        }
                im = new Array()
                for (var i = 0; i < imag.length; i++){
                im[i] = new Image ()
                im[i].src = imag[i]
        }