function echeck(str) {
  var at="@"
  var dot="."
  var lat=str.indexOf(at)
  var lstr=str.length
  var ldot=str.indexOf(dot)
  if (str.indexOf(at)==-1){
     alert("Invalid E-mail Address")
     return false
  }
  if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
     alert("Invalid E-mail Address")
     return false
  }
  if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
      alert("Invalid E-mail Address")
      return false
  }
   if (str.indexOf(at,(lat+1))!=-1){
      alert("Invalid E-mail Address")
      return false
   }
   if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
      alert("Invalid E-mail Address")
      return false
   }
   if (str.indexOf(dot,(lat+2))==-1){
      alert("Invalid E-mail Address")
      return false
   }
   if (str.indexOf(" ")!=-1){
      alert("Invalid E-mail Address")
      return false
   }
   return true          
}

function ValidateForm(){
  var fname=document.quote.FirstName
  var lname=document.quote.LastName
  var emailID=document.quote.Email
  var phone=document.quote.Phone  
  
  if ((fname.value==null)||(fname.value=="")){
    alert("Please Enter Your First Name")
    fname.focus()
    return false
  }
  if ((lname.value==null)||(lname.value=="")){
    alert("Please Enter Your Last Name")
    lname.focus()
    return false
  }
  if ((phone.value==null)||(phone.value=="")){
    alert("Please Enter Your Phone Number")
    phone.focus()
    return false
  }
  if ((emailID.value==null)||(emailID.value=="")){
    alert("Please Enter Your Email Address")
    emailID.focus()
    return false
  }
  if (echeck(emailID.value)==false){
    emailID.value=""
    emailID.focus()
    return false
  }
  return true
 }