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")
           document.getElementById('email_result').innerHTML = "Invalid E-mail Address";
           return false;
        }

        if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
           //alert("Invalid E-mail Address")
           document.getElementById('email_result').innerHTML = "Invalid E-mail Address";
           return false;
        }

        if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
           //alert("Invalid E-mail Address")
           document.getElementById('email_result').innerHTML = "Invalid E-mail Address";
           return false;
        }

         if (str.indexOf(at,(lat+1))!=-1){
           //alert("Invalid E-mail Address")
           document.getElementById('email_result').innerHTML = "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")
           document.getElementById('email_result').innerHTML = "Invalid E-mail Address";
           return false;
         }

         if (str.indexOf(dot,(lat+2))==-1){
           //alert("Invalid E-mail Address")
           document.getElementById('email_result').innerHTML = "Invalid E-mail Address";
           return false;
         }
        
         if (str.indexOf(" ")!=-1){
           //alert("Invalid E-mail Address")
           document.getElementById('email_result').innerHTML = "Invalid E-mail Address";
           return false;
         }
         document.getElementById('email_result').innerHTML = "";
         return true;
    }

function verifyEmail(){
    var emailID=document.register.email
    
    if ((emailID.value==null)||(emailID.value=="")){
        //alert("Please Enter your Email ID")
        //emailID.focus()
    }
    if (echeck(emailID.value)==false){
        //emailID.focus()
    }
}