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 emailID=document.OnlineRequest.email
var nameID=document.OnlineRequest.NameField
var phoneID=document.OnlineRequest.PhoneField

if ((nameID.value==null)||(nameID.value=="")){
alert("Please Enter your name")
nameID.focus()
return false
}
if ((emailID.value==null)||(emailID.value=="")){
alert("Please Enter your Email Address")
emailID.focus()
return false
}
if ((phoneID.value==null)||(phoneID.value=="")){
alert("Please Enter your Phone Number")
phoneID.focus()
return false
}
if (echeck(emailID.value)==false){
emailID.value=""
emailID.focus()
return false
}
return true
}