function check_email ( j_email ){	

if ( j_email.indexOf("@") < 1 

  || j_email.indexOf("@") == j_email.length-1     

  || j_email.indexOf("@") != j_email.lastIndexOf("@")

  || j_email.indexOf("*") != -1 

  || j_email.indexOf("+") != -1

  || j_email.indexOf("/") != -1 

  || j_email.indexOf("..") != -1

  || j_email.indexOf("@.") != -1 

  || j_email.charAt(0) != escape(j_email.charAt(0))

  || j_email.charAt(0) == "-"

  || j_email.charAt(0) == "_"

  || j_email.charAt(0) == "."

  || j_email.charAt(j_email.length-1) == "."

  || j_email.substring(j_email.indexOf("@"),j_email.length).indexOf(".") == -1 ) return 1;

  for ( var i=0; i<j_email.length; i++ ){

    if ( j_email.charAt(i) != escape(j_email.charAt(i)) 

      && j_email.charAt(i) != "@" )  return 1;

  }

return "";

}