仿浏览器CTRL+F页内查找功能，JS代码如下

var n = 0;
function findInPage(str) {
if (document.all) {
var txt, i, found;
if (str == ""){
return false;
}
txt =document.body.createTextRange();
for (i = 0; i <= found="txt.findText(str))"> 0) {n = 0;findInPage(str);}}return false;}else{//谷歌循环查找window.find(str,false,true);}}</=>

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