function emailValidator(elem){
	var emailExp = /^[\w\-\.\+]+\@[a-zA-Z0-9\.\-]+\.[a-zA-z0-9]{2,4}$/;
	if(elem.match(emailExp)){
		return true;
	}else{
		return false;
	}
}

function numbersonly(e, decimal) { 
    var key; 
    var keychar; 

    if (window.event) { 
       // IE
        key = window.event.keyCode; 
    } else if (e) { 
      // FireFox
        key = e.which; 
    } else { 
        return true; 
    } 

    keychar = String.fromCharCode(key); 
    if ((key == null) || (key == 0) || (key == 8) || (key == 9) || (key == 13) || (key == 27)) { 
        return true; 
    } else if ((("0123456789").indexOf(keychar) > -1)) { 
        return true; 
    } else {
        return false; 
	}
}