var invalidmsg="Please enter a valid Email Address"
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(invalidmsg)
return false}
if(str.indexOf(at)==-1||str.indexOf(at)==0||str.indexOf(at)==lstr){alert(invalidmsg)
return false}
if(str.indexOf(dot)==-1||str.indexOf(dot)==0||str.indexOf(dot)==lstr){alert(invalidmsg)
return false}
if(str.indexOf(at,(lat+1))!=-1){alert(invalidmsg)
return false}
if(str.substring(lat-1,lat)==dot||str.substring(lat+1,lat+2)==dot){alert(invalidmsg)
return false}
if(str.indexOf(dot,(lat+2))==-1){alert(invalidmsg)
return false}
if(str.indexOf(" ")!=-1){alert(invalidmsg)
return false}
return true}
function ValidateForm(){var emailID=document.contact_form.email
if((emailID.value==null)||(emailID.value=="")){alert("Please enter an Email Address")
emailID.focus()
return false}
if(echeck(emailID.value)==false){emailID.value=""
emailID.focus()
return false}
alert(emailID.value+" has been added to the mailing list.")
return true}