<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>check</title><script src="http://code.jquery.com/jquery-latest.js"></script></head><body><div> <input type="text" id="txtTag" style="width:60%; height:20px;" maxlength="100"> <input id="chk_tag_" type="checkbox" onclick="chkTag(this)"> <label for="chk_tag_">猴子</label> <input id="chk_tag_1" type="checkbox" onclick="chkTag(this)"> <label for="chk_tag_1">大象</label> <input id="chk_tag_2" type="checkbox" onclick="chkTag(this)"> <label for="chk_tag_2">獅子</label></div></body><script type="text/javascript"> String.PRototype.trim = function (c) { if (!c) c = "//s"; return this.replace(new RegExp("(^" + c + "+)|(" + c + "+$)", "ig"), ""); }; function chkTag(e) { var val = ""; if (e.checked) { val = $("#txtTag").val().trim(',').trim('，') + ',' + $(e).next().text(); val = val.trim(',').trim('，'); } else { val = $("#txtTag").val().replace(new RegExp("(^|[,，])(" + $(e).next().text().replace(/([()])/g,'//$1') + ")([,，]|$)", "ig"), function (all, s1, s2, s3) { return (s1 && s3) ? s1 : ''; }); } $("#txtTag").val(val.trim(',')); }</script></html>
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