function charRestrict(myfield, e, option) {
	//alert(dec);
	if (option == '1') {
		dec = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
	}
	if (option == '2') {
		dec = '., abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
	}
	if (option == '3') {
		dec = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_@.';
	}
	if (option == '4') {
		dec = '0123456789';
	}
	if (option == '5') {
		dec = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
	}
	if (option == '6') {
		dec = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789 \':?!-,.()$%";
	}
	if (option == '7') {
		dec = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789 -_";
	}
	
	var key;
	var keychar;

	if (window.event)
   		key = window.event.keyCode;
	else if (e)
   		key = e.which;
	else
   	return true;
	keychar = String.fromCharCode(key);

	// control keys
	if ((key==null) || (key==0) || (key==8) || 
    	(key==9) || (key==13) || (key==27) )
   	return true;

	else if (((dec).indexOf(keychar) > -1))
   	return true;
	else
	return false;
}