http://june44.com/board/blog/54

<INPUT onkeydown=onlyEditableNumber(this) onkeyup=onlyEditableNumber(this) name=number> 숫자를 입력 해 보세요~
<SCRIPT language=JavaScript>
//콤마표현 없는 정수만입력
function onlyEditableNumber(obj){
 var str = obj.value;
 str = new String(str);
 var Re = /[^0-9]/g; 
 str = str.replace(Re,'');
 obj.value = str;
}
</SCRIPT>