页面的关键词高亮

function keyLight(id, key, bgColor) {
  var oDiv = document.getElementById(id),
  sText = oDiv.innerHTML,
  bgColor = bgColor || "orange",
  sKey = "<span style='color: " + bgColor + ";'>" + key + "</span>",
  num = -1,
  rStr = new RegExp(key, "g"),
  rHtml = new RegExp("\<.*?\>", "ig"), //匹配html元素
  aHtml = sText.match(rHtml); //存放html元素的数组
  sText = sText.replace(rHtml, '{~}');  //替换html标签
  sText = sText.replace(rStr, sKey); //替换key
  sText = sText.replace(/{~}/g, function () {  //恢复html标签
  num++;
  return aHtml[num];
  });
  oDiv.innerHTML = sText;
}
var key1 = keyLight('result', '关键词');
var key2 = keyLight('result', '关键词', 'red')

 

posted @ 2018-02-27 12:04  蔡春保  阅读(220)  评论(0编辑  收藏  举报