function RestrictedCharacters(event) {
var key,keychar;
if(window.event)
	key = window.event.keyCode;
else if (event.which)
	key = event.which;
else
	return true;
keychar = String.fromCharCode(key);
//Check for special characters like backspace then check for the numbers
if ((("'\&#][()@!$%*=+-_/").indexOf(keychar) > -1)) {
	alert("Single quotes and special symbols are not allowed");
	return false;
	}
else
	return true;
}