function validate_email() {
    
if(document.jsform.email.value == "") { 
    document.jsform.email.focus(); 
     alert("Please enter your email address."); 
     return false; 
      }



if(-1 == document.jsform.email.value.indexOf("@")) { 
       document.jsform.email.focus(); 
       alert("Your email must have a '@'."); 
       return false; 
       }

if(-1 == document.jsform.email.value.indexOf(".")) { 
       document.jsform.email.focus(); 
       alert("Your email must have a '.'"); 
       return false; 
       }

 if(-1 != document.jsform.email.value.indexOf(",")) { 
       document.jsform.email.focus(); 
       alert("Your email must not have a ',' in it"); 
       return false; 
       }

if(-1 != document.jsform.email.value.indexOf("#")) { 
       document.jsform.email.focus(); 
       alert("Your email must not have an '#' in it." ); 
       return false; 
       }

if(-1 != document.jsform.email.value.indexOf("!")) { 
       document.jsform.email.focus(); 
       alert("Your email must not have a '!' in it." ); 
       return false; 
       }

if(-1 != document.jsform.email.value.indexOf(" ")) { 
       document.jsform.email.focus(); 
       alert("Your email must not have a space in it." ); 
       return false; 
       }



    return true;
  }