function validate_required(field,alerttxt)
{
with (field)
  {
  if (value==null||value=="")
    {
    alert(alerttxt);return false;
    }
  else
    {
    return true;
    }
  }
}


function validate_email(field,alerttxt)
{
with (field)
  {
  apos=value.indexOf("@");
  dotpos=value.lastIndexOf(".");
  if (apos<1||dotpos-apos<2)
    {alert(alerttxt);return false;}
  else {return true;}
  }
}

function validate_form(thisform)
{
with (thisform)
  {
  if (validate_required(Name,"Name field is empty")==false)
  {Name.focus();return false;}  
  
  if (validate_email(Email,"Not a valid e-mail address!")==false)
    {Email.focus();return false;}


		
  if (validate_required(Message,"Message field is empty")==false)
  {Message.focus();return false;}		
  	
  }
  
  return true;
  
}


function vPic(picPath, picDesc)
{
 elem = document.getElementById("full");
 elem1 = document.getElementById("pictdesc");
 elem2 = document.getElementById("bigpic");
				 
 elem2.src = picPath;
 elem2.alt = picDesc;
 elem1.innerHTML = picDesc;
 
 elem.style.display='block';		
}
		
function hidePic()
{
 elem = document.getElementById("full");
 elem.style.display='none';		
}