//char
function cbchar(obj){
	obj.value = obj.value.replace(/cmd|adodb|exec|execute|insert|select|delete|update|master|truncate|declare|join|union|where|and|like|script|iframe|object|applet|drop|create|nchar|char|alter|cast|exists|rename|count|mid|include/ig,'');
}

//number
function cbno(obj){
	obj.value = obj.value.replace(/\D/g,'');
}