Mega Code Archive
RegExp lastIndex
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The lastIndex property gets the index of where the next match begins.
<html>
<body>
<script language="JavaScript">
<!--
exp=/is*/g;
str = "This is just a sample sentence.";
myArray = exp.exec(str);
document.write("Found: " + myArray[0] +". Next match starts at index: " + exp.lastIndex);
-->
</script>
</body>
</html>
]]>