Voltar e Avançar do browser ...

Fala Galera ...

Me de uma ajuda ae ....

O codigo esta funcionando corretamente , mais só que quando eu coloco para voltar no browser

e depois avançar ele carrega a tela com o checkbox habilitado mais os textos ficam

desabilitados .... me ajudem a resolver esse probleminha ... abraços

Abaixo o codigo html e javascript

<td align = 'left'> <table width="75%" class='caixa_login' bgcolor='pink'> <tr> <td>Enviar Para:</td> <td><DIV class='email'><INPUT type=checkbox name=ChkEnd value='1' onclick='Valida_Checkbox_End()'> Endereço do Cadastro</td></tr><tr><td></td><td><DIV class='email'><INPUT type=checkbox name=ChkEmail value='2' onclick='Valida_Checkbox_Email()'><width='200px'> E-mail <INPUT name=txtEmail size='25' maxLength=35 disabled></td></tr><tr><td></td><td><DIV class='email'><INPUT type=checkbox name=ChkFax value='3' onclick='Valida_Checkbox_Fax()'><width='200px'> Fax <INPUT name=txtFax size='8' maxLength=8 onKeyDown = 'return somente_numeros(this,event);' disabled></td></tr><tr><td></td><td class='email'><INPUT type=checkbox name=ChkInd value='4' onclick='Valida_Checkbox_Ind()'><width='200PX'> Endereço Indicado Abaixo <TABLE style='WIDTH: 302px; HEIGHT: 119px' cellSpacing=1 cellPadding=1 width=302 border=0 ><TR><TD>   </TD><TD class='email'>Endereço :</TD><TD><INPUT onkeyup=somente_maiusculas(this,event); maxLength=50 size=30 name=txtRua disabled></TD></TR><TR><TD></TD><TD class='email'>Bairro :</TD><TD><INPUT onkeydown='return somente_letras(this,event);' onkeyup=somente_maiusculas(this,event); disabled maxLength=35 size=30 name=txtBairro></TD></TR><TR><TD></TD><TD class='email'>Cidade :</TD><TD><INPUT onkeydown='return somente_letras(this,event);' onkeyup=somente_maiusculas(this,event); disabled maxLength=35 size=30 name=txtCidade></TD></TR><TR><TD><TD class='email'>CEP :</TD><TD><INPUT onkeypress='return FormataCampo(this.form,this,"99999-999",event);' disabled maxLength=9 size=9 name=txtCep></TD></TR><TR><TD></TD><TD class='email'>Estado : </TD><TD><INPUT onkeydown='return somente_letras(this,event);'onkeyup=somente_maiusculas(this,event); disabled maxLength=2 size=2 name=txtEstado></TD></TR></TABLE></table></td></TD></TR></table></table><HR class=cinza SIZE=1><table><tr><TD align=middle width='20%' > </TD><td><p align=center><A onclick='ValidaCamposEmail(); return false;' onfocus='Retorna_Envia()' href='' name='botaoEnvia'><IMG src='imagens\bot_envia.gif'alt='Envia Email' border=0></A><A onclick='limpa_campos_Email(); return false;' href=''><IMG src='imagens/bot_limpa_mai.gif' border=0></a></P></td><TD align=middle width='20%' ></TD> </tr></TR> </table> </td> </TD> </TR></table>

o Java sript é esse :

function Valida_Checkbox_End(){ var form = document.frmEmail; var msg; if (document.getElementById('ChkEnd').checked == true) { document.getElementById('ChkEmail').checked = false document.getElementById('ChkFax').checked = false document.getElementById('ChkInd').checked = false document.getElementById('txtEmail').disabled = "disabled" document.getElementById('txtFax').disabled = "disabled" document.getElementById('txtRua').disabled = "disabled" document.getElementById('txtCep').disabled = "disabled" document.getElementById('txtBairro').disabled = "disabled" document.getElementById('txtEstado').disabled = "disabled" document.getElementById('txtCidade').disabled = "disabled" form.txtEmail.value = "" form.txtFax.value = "" form.txtRua.value = "" form.txtCep.value = "" form.txtBairro.value = "" form.txtEstado.value = "" form.txtCidade.value = "" }}function Valida_Checkbox_Email(){ var form = document.frmEmail; var msg; if(document.getElementById('ChkEmail').checked == true) { document.getElementById('ChkEnd').checked = false document.getElementById('ChkFax').checked = false document.getElementById('ChkInd').checked = false document.getElementById('txtEmail').disabled = "" form.txtFax.value = "" form.txtRua.value = "" form.txtCep.value = "" form.txtBairro.value = "" form.txtEstado.value = "" form.txtCidade.value = "" document.getElementById('txtFax').disabled = "disabled" document.getElementById('txtRua').disabled = "disabled" document.getElementById('txtCep').disabled = "disabled" document.getElementById('txtBairro').disabled = "disabled" document.getElementById('txtEstado').disabled = "disabled" document.getElementById('txtCidade').disabled = "disabled" }}function Valida_Checkbox_Fax(){ var form = document.frmEmail; var msg; if (document.getElementById('ChkFax').checked == true) { document.getElementById('ChkEnd').checked = false document.getElementById('ChkEmail').checked = false document.getElementById('ChkInd').checked = false document.getElementById('txtFax').disabled = "" form.txtEmail.value = "" form.txtRua.value = "" form.txtCep.value = "" form.txtBairro.value = "" form.txtEstado.value = "" form.txtCidade.value = "" document.getElementById('txtEmail').disabled = "disabled" document.getElementById('txtRua').disabled = "disabled" document.getElementById('txtCep').disabled = "disabled" document.getElementById('txtBairro').disabled = "disabled" document.getElementById('txtEstado').disabled = "disabled" document.getElementById('txtCidade').disabled = "disabled" }}function Valida_Checkbox_Ind(){ var form = document.frmEmail; var msg; if (document.getElementById('ChkInd').checked == true) { document.getElementById('ChkEnd').checked = false document.getElementById('ChkEmail').checked = false document.getElementById('ChkFax').checked = false form.txtEmail.value = "" form.txtFax.value = "" document.getElementById('txtRua').disabled = "" document.getElementById('txtCep').disabled = "" document.getElementById('txtBairro').disabled = "" document.getElementById('txtEstado').disabled = "" document.getElementById('txtCidade').disabled = "" document.getElementById('txtEmail').disabled = "disabled" document.getElementById('txtFax').disabled = "disabled" } }