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);
            }
        }