imag = new Array ()
     imag[0] = "images/nav/home.gif"
     imag[1] = "images/nav/home_on.gif"
     imag[2] = "images/nav/doctors.gif"
	 imag[3] = "images/nav/doctors_on.gif"
     imag[4] = "images/nav/mission.gif"
     imag[5] = "images/nav/mission_on.gif"
	 imag[6] = "images/nav/officetour.gif"
     imag[7] = "images/nav/officetour_on.gif"
     imag[8] = "images/nav/policies.gif"
	 imag[9] = "images/nav/policies_on.gif"
     imag[10] = "images/nav/faq.gif"
     imag[11] = "images/nav/faq_on.gif"
	 imag[12] = "images/nav/ortho.gif"
     imag[13] = "images/nav/ortho_on.gif"
     imag[14] = "images/nav/braces101.gif"
	 imag[15] = "images/nav/braces101_on.gif"
     imag[16] = "images/nav/emergencycare.gif"
     imag[17] = "images/nav/emergencycare_on.gif"
	 imag[18] = "images/nav/gameroom.gif"
     imag[19] = "images/nav/gameroom_on.gif"
	 imag[20] = "images/nav/contactus.gif"
     imag[21] = "images/nav/contactus_on.gif"
	 	 imag[22] = "images/nav/forchildren.gif"
     imag[23] = "images/nav/forchildren_on.gif"
    imag[24] = "images/nav/foradults.gif"
     imag[25] = "images/nav/foradults_on.gif"
	  imag[26] = "images/nav/treatments.gif"
     imag[27] = "images/nav/treatments_on.gif"
	imag[28] = "images/nav/dictionary.gif"
     imag[29] = "images/nav/dictionary_on.gif"
	 imag[30] = "images/nav/resources.gif"
     imag[31] = "images/nav/resources_on.gif"
	 imag[32] = "images/nav/typesofbraces.gif"
     imag[33] = "images/nav/typesofbraces_on.gif"
	 imag[34] = "images/nav/appliances.gif"
     imag[35] = "images/nav/appliances_on.gif"
	 imag[36] = "images/nav/invisalign.gif"
     imag[37] = "images/nav/invisalign_on.gif"
	 imag[38] = "images/nav/ibraces.gif"
     imag[39] = "images/nav/ibraces_on.gif"
	 imag[40] = "images/nav/diagram.gif"
     imag[41] = "images/nav/diagram_on.gif"
	 imag[42] = "images/nav/bracepainter.gif"
     imag[43] = "images/nav/bracepainter_on.gif"
	 imag[44] = "images/nav/video.gif"
     imag[45] = "images/nav/video_on.gif"
	 imag[46] = "images/nav/retainers.gif"
     imag[47] = "images/nav/retainers_on.gif"
	 	 imag[48] = "images/nav/comments.gif"
     imag[49] = "images/nav/comments_on.gif"
	 	 	 imag[50] = "images/nav/refer.gif"
     imag[51] = "images/nav/refer_on.gif"
	 	 	 	 imag[52] = "images/nav/newsletters.gif"
     imag[53] = "images/nav/newsletters_on.gif"

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]
        }