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

{

for (var i=0; i < document.quoteform.V3.length; i++)
   {
   if (document.quoteform.V3[i].checked)
      {
      var rad_val = document.quoteform.V3[i].value;
      }
   }

if (rad_val =="cm"){
  with (field)
  {

    if (value<4||value=="")
      {alert("Minimum Thickness allowed is 4cm");return false}
    else {return true}
  }}
 else {

  with (field)
  {

    if (value<1.5||value=="")
      {alert("Minimum Thickness allowed is 1.5 inches");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_value(Thickness)==false)
      {Thickness.focus();return false}

    if (validate_required(Email,"Email must be filled out")==false)
      {Email.focus();return false}
    if (validate_email(Email,"Not a valid e-mail address")==false)
      {Email.focus();return false}
   
  }
}