function doClear(theText) {
  if (theText.value == theText.defaultValue) {
    theText.value = ""
    }
}

	<!-- Hide script from old browsers

if (document.images) {
		
		
		button_a = new Image
		button_a_roll = new Image
		button_b = new Image
		button_b_roll = new Image
		button_c = new Image
		button_c_roll = new Image
		button_d = new Image
		button_d_roll = new Image
		button_d2 = new Image
		button_d2_roll = new Image
		button_e = new Image
		button_e_roll = new Image
		button_f = new Image
		button_f_roll = new Image
		button_g = new Image
		button_g_roll = new Image
		button_h = new Image
		button_h_roll = new Image
		button_i = new Image
		button_i_roll = new Image
		button_j = new Image
		button_j_roll = new Image
		button_k = new Image
		button_k_roll = new Image
		main = new Image
		main_a = new Image
		main_b = new Image
		main_c = new Image
		main_d = new Image
		main_e = new Image
		main_f = new Image
		main_g = new Image
		main_h = new Image





		
		
		button_a.src = "images/navNew/button_a.gif"
		button_a_roll.src = "images/navNEW/button_a_over.gif"
		button_b.src = "images/navNEW/button_b.gif"
		button_b_roll.src = "images/navNEW/button_b_over.gif"
		button_c.src = "images/navNEW/button_c.gif"
		button_c_roll.src = "images/navNEW/button_c_over.gif"
		button_d.src = "images/navNEW/button_d.gif"
		button_d_roll.src = "images/navNEW/button_d_over.gif"
		button_d2.src = "images/navNEW/button_d2.gif"
		button_d2_roll.src = "images/navNEW/button_d2_over.gif"
		button_e.src = "images/navNEW/button_e.gif"
		button_e_roll.src = "images/navNEW/button_e_over.gif"
		button_f.src = "images/navNEW/button_f.gif"
		button_f_roll.src = "images/navNEW/button_f_over.gif"
		button_g.src = "images/navNEW/button_g.gif"
		button_g_roll.src = "images/navNEW/button_g_over.gif"
		button_h.src = "images/navNEW/button_h.gif"
		button_h_roll.src = "images/navNEW/button_h_over.gif"
		button_i.src = "images/navNEW/button_i.gif"
		button_i_roll.src = "images/navNEW/button_i_over.gif"
		button_j.src = "images/navNEW/button_j.gif"
		button_j_roll.src = "images/navNEW/button_j_over.gif"
		button_k.src = "images/navNEW/button_k.gif"
		button_k_roll.src = "images/navNEW/button_k_over.gif"
		main.src = "images/navNEW/main.jpg"
		main_a.src = "images/navNEW/main_a.jpg"
		main_b.src = "images/navNEW/main_b.jpg"
		main_c.src = "images/navNEW/main_c.jpg"
		main_d.src = "images/navNEW/main_d.jpg"
		main_e.src = "images/navNEW/main_e.jpg"
		main_f.src = "images/navNEW/main_f.jpg"
		main_g.src = "images/navNEW/main_g.jpg"
		main_h.src = "images/navNEW/main_h.jpg"
		

		



		
	}
	else {

	
		
		document.button_a = ""
		document.button_a_roll = ""
		document.button_b = ""
		document.button_b_roll = ""
		document.button_c = ""
		document.button_c_roll = ""
		document.button_d = ""
		document.button_d_roll = ""
		document.button_d2 = ""
		document.button_d2_roll = ""
		document.button_e = ""
		document.button_e_roll = ""
		document.button_f = ""
		document.button_f_roll = ""
		document.button_g = ""
		document.button_g_roll = ""
		document.button_h = ""
		document.button_h_roll = ""
		document.button_i = ""
		document.button_i_roll = ""
		document.button_j = ""
		document.button_j_roll = ""
		document.button_k = ""
		document.button_k_roll = ""
		document.main = ""
		document.main_a = ""
		document.main_b = ""
		document.main_c = ""
		document.main_d = ""
		document.main_e = ""
		document.main_f = ""
		document.main_g = ""
		document.main_h = ""


		}
	


	function over1() {
		document.ba.src=button_a_roll.src
		document.mn.src=main_a.src
		
		}
		
	function out1() {
		document.ba.src=button_a.src
		document.mn.src=main.src
		
		}

	function over2() {
		document.bb.src=button_b_roll.src
		document.mn.src=main_b.src
		
		}
		
	function out2() {
		document.bb.src=button_b.src
		document.mn.src=main.src
		
		}

	function over3() {
		document.bc.src=button_c_roll.src
		document.mn.src=main_c.src
		
		}
		
	function out3() {
		document.bc.src=button_c.src
		document.mn.src=main.src
		
		}

	function over4() {
		document.bd.src=button_d_roll.src
		document.mn.src=main_d.src
		
		}
		
	function out4() {
		document.bd.src=button_d.src
		document.mn.src=main.src
		
		}
		
	function over4B() {
		document.bd.src=button_d2_roll.src
		document.mn.src=main_d.src
		
		}
		
	function out4B() {
		document.bd.src=button_d2.src
		document.mn.src=main.src
		
		}

	function over5() {
		document.be.src=button_e_roll.src
		document.mn.src=main_e.src
		
		}
		
	function out5() {
		document.be.src=button_e.src
		document.mn.src=main.src
		
		}

	function over6() {
		document.bf.src=button_f_roll.src
		document.mn.src=main_f.src
		
		}
		
	function out6() {
		document.bf.src=button_f.src
		document.mn.src=main.src
		
		}

	function over7() {
		document.bg.src=button_g_roll.src
		document.mn.src=main_g.src
		
		}
		
	function out7() {
		document.bg.src=button_g.src
		document.mn.src=main.src
		
		}
		
	function over8() {
		document.bh.src=button_h_roll.src
		document.mn.src=main_h.src
		
		}
		
	function out8() {
		document.bh.src=button_h.src
		document.mn.src=main.src
		
		}