js字符串截取首尾，中间用点号替换

<script language="javascript">
var a="终古人民共和国";
var len=a.length;
alert(len);
var xx=a.substring(3,len-2);
alert(xx);
var a=a.replace(xx,"..");
alert(a);
</script>
----

<c:if test="${fn:length(treeMapRemark)>10}">

${fn:substring(treeMapRemark,0,10)}...

</c:if>
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