function isEmail(fElement){
    var EmailOk  = true;
    var Temp     = fElement;
    var AtSym    = Temp.value.indexOf('@');
    var Period   = Temp.value.lastIndexOf('.');
    var Space    = Temp.value.indexOf(' ');
    var Length   = Temp.value.length - 1  ; // Array is from 0 to length-1

	    if ((AtSym < 1) || (Period <= AtSym+1) || (Period == Length ) || (Space  != -1)){
          return (false);
       }
     return (true);
}