<script type="text/javascript"
src="http://pagead2.googlesyndication.com/pagead/show_ads.js">
</script>
<script type="text/javascript"> function showtext(aa){
textarea=document.getElementById(aa).value;
alert(textarea)
}
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<a onclick="showtext('PersonVita')" href="#" >点击取值</a>
<textarea id="PersonVita">我的值你可以取到吗?</textarea>