<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>007</title>
</head>
<style type="text/css">
.found
{
background-color: #ff0;
}
</style>
<body>
<form id="textsearch">
<textarea id="incoming" cols="150" rows="10">
</textarea>
<p>
Search pattern: <input type="text" id="pattern" type="text">
</p>
</form>
<button id="searchSubmit">Search for pattern</button>
<div id="searchResult"></div>
</body>
<script type="text/javascript">
document.getElementById("searchSubmit").onclick=function(){
var pattern = document.getElementById("pattern").value;
var re = new RegExp(pattern, "g");
var searchString = document.getElementById("incoming").value;
var matchArray;
var resultString = "<pre>";
var first = 0;
var last = 0;
while((matchArray = re.exec(searchString)) != null){
last = matchArray.index;
resultString += searchString.substring(first, last);
resultString += "<span class='found'>" + matchArray[0] + "</span>";
console.log(matchArray[0]);
first = re.lastIndex;
}
resultString += searchString.substring(first, searchString.length);
resultString += "</pre>";
console.log(resultString);
document.getElementById("searchResult").innerHTML = resultString;
};
</script>
</html>
