function farsikey(myfield,e)
{
    var key;
    var basestring=' !"#$%،گ)(×+و-./0123456789:ک,=.؟@ِذ}ىُىلآ÷ـ،/’د×؛َءٍف‘{ًْإ~جژچ^_پشذزیثبلاهتنمئدخحضقسفعرصطغظ<|>ّ';
    if (window.event)
        key = window.event.keyCode;
        
    else if (e)
        key = e.which;
        
    if (key < 0x0020 || key >= 0x00FF) 
        return true; 
        
	if (window.event)
	    window.event.keyCode=basestring.charCodeAt(key-32);
	else if (e)
		e.which=basestring.charCodeAt(key-32);
	return true;
}