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 ID")
     return false
  }
  if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
     alert("Invalid E-mail ID")
     return false
  }
  if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
      alert("Invalid E-mail ID")
      return false
  }
   if (str.indexOf(at,(lat+1))!=-1){
      alert("Invalid E-mail ID")
      return false
   }
   if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
      alert("Invalid E-mail ID")
      return false
   }
   if (str.indexOf(dot,(lat+2))==-1){
      alert("Invalid E-mail ID")
      return false
   }
   if (str.indexOf(" ")!=-1){
      alert("Invalid E-mail ID")
      return false
   }
   return true          
}

function ValidateForm(){
  
  
      //NAME
    var nameID=document.contactus.name
  if ((nameID.value==null)||(nameID.value=="")){
    alert("Please Enter your Name:")
    nameID.focus()
    return false
   //return true
  
  
  }
  
//Company_name
    var Company_nameID=document.contactus.Company_name
  if ((Company_nameID.value==null)||(Company_nameID.value=="")){
    alert("Please Enter your Company Name:")
    Company_nameID.focus()
    return false
   //return true
  }
  
  //Phone
    var phoneID=document.contactus.phone
  if ((phoneID.value==null)||(phoneID.value=="")){
    alert("Please Enter your Telephone Number:")
    phoneID.focus()
    return false
   //return true
  }
  
  
  
  
  
  
  var emailID=document.contactus.email

  
  if ((emailID.value==null)||(emailID.value=="")){
    alert("Please Enter your Email ID:")
    emailID.focus()
    return false
   //return true
  }
  else if (echeck(emailID.value)==false){
    emailID.value=""
    emailID.focus()
    return false
  }
  
  //Confirm Email
  var confirm_emailID=document.contactus.confirm_email

  
  if ((confirm_emailID.value==null)||(confirm_emailID.value=="")){
    alert("Please Confirm your Email ID:")
    confirm_emailID.focus()
    return false
   //return true
  }
  else if (echeck(confirm_emailID.value)==false){
    confirm_emailID.value=""
    confirm_emailID.focus()
    return false
  }
  

  return true
 }