Same question has been asked here: How to pass a regular expression as a function parameter, and I tried it like this:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
<script type="text/javascript">
function validate(value, regexp){
//escape special characters
var regexp = regexp.replace(/([-()\[\]{}+?*.$\^|,:#<!\\])/g, '\\$1').replace(/\x08/g, '\\x08');
return new RegExp(regexp,'g').test(value);
}
</script>
</head>
<body>
<script>
var regexp = "^(([^<>()[\]\\.,;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"]+)*)|(\".+\"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$";
alert(validate("[email protected]",regexp))
</script>
</body>
</html>
but it doesn't work,and I am sure the string of pattern is right,and I have tested it in firebug like this:
/^(([^<>()[\]\\.,;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"]+)*)|(\".+\"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/.test("[email protected]")
It matches email correctly.so Please tell what mistakes I have made,thanks.
