js检查页面上有无重复id

来源：互联网发布：js select鼠标点击事件编辑：程序博客网时间：2024/05/07 15:34

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<script type="text/javascript">
    function createDiv(){
        var html = [], id;
        for(var i = 0; i < 2000; i++){
            id = "divId" + parseInt(Math.random() * 10000);
            html.push("<div id='" + id + "'>" + id + "</div>");
        }
        document.body.innerHTML = html.join("");
    }
    window.onload = function(){
        createDiv();

        var oID = {} , result = {}, arr = [],
            tags = document.getElementsByTagName("*");
        for(var i = 0, id; i < tags.length; i++){
            id = tags[i].id;
            if(id){
                oID[id] = oID[id] ? oID[id] + 1 : 1;
                if(oID[id] > 1){
                    result[id] = id + " " + oID[id]; } } } for(var o in result){
            arr.push(result[o]);
        }
        alert(arr.join("/t"));
    };
</script>
</HEAD>

<BODY>
</BODY>
</HTML>