<script>
function CheckStr(s){
return s == s.match(/^[\+\-\*\/\(\)\d]+$/)
}var str1="+-****//())))(++--12341234"
var str2="+-+-****//())123aaa))(++--"
alert(CheckStr(str1));
alert(CheckStr(str2));
</script>
function CheckStr(s){
return s == s.match(/^[\+\-\*\/\(\)\d]+$/)
}var str1="+-****//())))(++--12341234"
var str2="+-+-****//())123aaa))(++--"
alert(CheckStr(str1));
alert(CheckStr(str2));
</script>
<html>
<head>
<title> New Document </title>
<meta name="Generator" content="EditPlus">
<meta name="Author" content="">
<meta name="Keywords" content="">
<meta name="Description" content="">
<script language="JavaScript">
<!--
var a = "(1+2)";try
{
var k = eval(a);
alert('right');
}
catch(e)
{
alert('error');
}//-->
</script>
</head><body></body>
</html>
{
try
{
var k = eval(exp);
return true;
}
catch(e)
{
return false;
}
}