function popupCharge(){
	document.getElementById('botaoEnviarCharge').style.display="none";
	document.getElementById('imgCharge').style.width="0px";
	document.getElementById('imgCharge').style.height="0px";
	document.getElementById('divCharge').innerHTML="<form action='enviar_charge.php' enctype='multipart/form-data' method='POST' name='frmCharge' onSubmit='return chkRequired(this);'><TABLE WIDTH='100%' BORDER=0 CELLPADDING=8 CELLSPACING=0><TR><TD class='labelFrmCharge'>Seu Nome:</TD><TD><input type='text' name='nome' class='txtFrmCharge' required='true'></TD></TR><TR><TD class='labelFrmCharge'>Seu E-mail:</TD><TD><input type='text' name='email' class='txtFrmCharge' required='true'></TD></TR><TR><TD class='labelFrmCharge'>Charge:</TD><TD><input type='file' name='arquivo' class='txtFrmCharge' required='true'></TD></TR><TR><TD COLSPAN=2><input type='submit' value='Enviar' class='txtFrmCharge'></TABLE></form>";
}


function chkRequired(frm, msg){

   if (!frm) frm = document.forms[0];

   if (!msg || msg=="") msg="Campo obrigatório não preenchido";

   for (var i=0; i<frm.elements.length; i++) {

      if (frm.elements[i].getAttribute("required")=="true") {

         var ok = false;

         if (frm.elements[i].type.toLowerCase()=="radio") {

            for (var j=0; j<frm[frm.elements[i].name].length; j++) {

               if (frm[frm.elements[i].name][j].checked) {

                  ok = true; break;

               }

            }

         } else ok = !(frm.elements[i].value=="");

         if (!ok) {

          alert(msg);

        frm.elements[i].focus();

        return false;

      }

      }

  }

   return true;

}