function r_on(i) {
  if (document.images) { 
    if (document[i].src.indexOf("down") < 0) {
      document[i].src = "/images/" + i + "_over.gif"; 
    }
  }
}

function r_off(i) {
  if (document.images) { 
    if (document[i].src.indexOf("down") < 0) {
      document[i].src = "/images/" + i + ".gif"; 
    }
  }
}

function s_on(i) {
  if (document.images) { 
    if (document[i].src.indexOf("down") < 0) {
      document[i].src = "images/" + i + "_over.gif"; 
    }
  }
}

function s_off(i) {
  if (document.images) { 
    if (document[i].src.indexOf("down") < 0) {
      document[i].src = "images/" + i + ".gif"; 
    }
  }
}

function writeDate() {
  var today = new Date();
  var year = today.getFullYear();
  document.write(year);
}

function leaveSite(site) {
  if (confirm('You are now leaving the Leo R. McCafferty M.D., F.A.C.S. web site.\nIf you do not wish to leave this site, click Cancel. Click OK to leave.') == 1) {
    window.open(site, 'Untitled','toolbar=yes,width=750,height=500,directories=no,status=no,scrollbars=yes,resizable=yes,menubar=yes')
  }
}

function popUp(page) {
  popup_window = window.open(page,'popup','location,menubar,resizable,scrollbars,status,toolbar,width=500,height=300');
}

function formrule(field)
{
	if (field.defaultValue == field.value) field.value = "";
}

function formrule2(field) {
  if (field.value == "") {
    field.value = field.defaultValue;
  }
}

function checkrequired(frm) {		// validate form1
    if ((frm.required_name.value=='') || (frm.required_name.value=='name')) {
     alert('Please enter name');
     frm.required_name.focus()
     return false;
  }
  // check to see if email address field is of valid syntax
  substremail = frm.required_email.value.split("@")
  if (substremail.length > 1) {
     index = substremail[1].indexOf(".")
     if (index == -1) {
       alert("Please enter a valid e-mail address")
       frm.required_email.focus()
       return false
     }
  } else {
    alert("Please enter a valid e-mail address")
    frm.required_email.focus()
    return false
  }
  if ((frm.required_dayphone.value=='') || (frm.required_dayphone.value=='phone')) {
    alert('Please enter phone number');
    frm.required_dayphone.focus()
    return false;
  }
//	frm.name.value = frm.fname.value + ' ' + frm.name.value
  return true;
}