Textarea Auto Resize using JQuery

<style type="text/css">
textarea {
    resize: none;
    overflow: hidden;
    min-height: 50px;
    max-height: 100px;
}
</style>

<textarea oninput="auto_grow(this)"></textarea>

<script type="text/javascript">
function auto_grow(element) {
    element.style.height = "5px";
    element.style.height = (element.scrollHeight)+"px";
}
</script>