function validateemail(formname)
 {
   	var mailobj=formname.mailtxt;
	var dot="."
	var at="@"
	var iChars = "--!#$%^&*()+=[]\\\';,/{}|\":<>?";
	var str=mailobj.value
	var lat=str.indexOf(at)
        var lstr=str.length
	var ldot=str.indexOf(dot)
 
  
  if ((mailobj.value==null)||(mailobj.value=="")){
    alert("Please Enter your Email ID")
    mailobj.focus()
    return false
   }

  if ((lat==-1) || (lat==0) || (lat==lstr)){
    alert("Invalid E-mail ID")
    mailobj.focus()
    return false
   }

  if (str.indexOf(at,(lat+1))!=-1){
     alert("Invalid E-mail ID")
     mailobj.focus()     
     return false
   }

  if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
     alert("Invalid E-mail ID")
     mailobj.focus()
     return false
   }


  if (str.indexOf(" ")!=-1){
    alert("Invalid E-mail ID")
    mailobj.focus()
    return false
   }
  
  for (var i = 0; i < mailobj.value.length; i++) {
  	if (iChars.indexOf(mailobj.value.charAt(i))!= -1)
	 {
   	  alert ("Your EmailId contains Specia characters.These are not allowed.Please remove them and try again.");
          mailobj.focus()
  	  return false;
  	 }
   }
  return true;
 }