exam.htm

<table>
<tr>
<td id="d" name="d"></td>
</tr>
</table>
<SCRIPT type=text/javascript>
alert(document.getElementById("d"));
//.innerHTML="AA";
function Keycode(e){
	var code = (window.event) ? event.keyCode : e.which; //IE : FF - Chrome both
	if (code > 32 && code < 48) nAllow(e);
	if (code > 57 && code < 65) nAllow(e);
	if (code > 90 && code < 97) nAllow(e);
	if (code > 122 && code < 127) nAllow(e); 
}
function nAllow(e){
	alert('특수문자는 사용할수 없습니다.');
	if(navigator.appName!="Netscape"){ //for not returning keycode value  
		event.returnValue = false;  //IE ,  - Chrome both 
	}else{
		e.preventDefault(); //FF ,  - Chrome both
   }
}
</SCRIPT> 
<INPUT class=box_long onkeypress=Keycode(event); maxLength=45 size=25 type=text name=memo>