<html>
<head>
<script type="text/javascript" src="jquery-1.2.6.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("#table").hide();
$("#edit").keyup(function (e){
if ($("#edit").val() == '0'){
$("#table").show();
}else{
$("#table").hide();
}
});
});
</script>
</head>
<body>
<form>
<input type="text" text="" id="edit" />
</form>
<table border="1" id="table">
<tr>
<td> </td>
</tr>
</table>
</body>
</html><html>
<body>
<script type="text/javascript">
function check()
{
var key = window.event.keyCode;
var elem = document.getElementById('msg');
if(key == 48)
{
event.returnValue = false;
elem.style.visibility = 'visible';
}
else
{
elem.style.visibility = 'hidden';
}
}
</script>
<input type="text" id="data" onKeyDown="check()"><div id="msg" style="visibility:hidden">Введите значение отличное от 0</div>
</body>
</html><html>
<head>
<script>
function check(e) {
var charCode = (e.which) ? e.which : e.keyCode
if (charCode > 57) return false;
return true;
}
</script>
</head>
<body>
<INPUT onkeypress="return check(event)" type="text"/>
</body>
</html>