JavaScript restricts the form from entering illegal characters

From , 3 Years ago, written in JavaScript, viewed 96 times.

<script language="javascript">
<!--
 
function contain(str,charset)// 字符串包含测试函数
{
var i;
for(i=0;i<charset.length;i++)
if(str.indexOf(charset.charAt(i))>=0)
return true;
return false;
}
 
function CheckForm()
{
if ((contain(document.form.NAME.value, "%\(\)><")) || (contain(document.form.MESSAGE.value, "%\(\)><")))
{
alert("输入了非法字符");
document.form.NAME.focus();
return false;
}
return true;
}
//-->
</script>
//javascript/263

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JavaScript restricts the form from entering illegal characters

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