代码收藏 JS实现页内查找定位功能

前部分为IE下搜索方法 用TextRange来实现

后部分为firefox、chrome下搜索方法

         var nextIndex = 0;
         var searchValue = '';
         var input1=document.getElementById('input1');

         function findInPage(searchText) {
             if (!searchText){
                 alert('搜索字符串为空');
             }

             if(searchText && searchText != searchValue && nextIndex > 0){
                 searchValue = searchText;
                 nextIndex = 0;
             }else{
                 searchValue = searchText;
             }

             if (document.all) {
                 txt = document.body.createTextRange();
                 var found =false;
                 for (var i = 0; i <= nextIndex && (found = txt.findText(searchValue))==true; i++) {
                     txt.moveStart("character", 1);
                     txt.moveEnd("textedit");
                 }

                 if (found) {
                     txt.moveStart("character",-1);
                     txt.findText(searchValue);
                     txt.select();
                     txt.scrollIntoView();
                     nextIndex++;
                 }else{
                     if (nextIndex > 0) {
                         nextIndex = 0;
                         findInPage(searchValue);
                     }
                 }
             }else{
                 window.find(searchValue,false,true);
             }
         }