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用js判断图片是否存在

2015-08-26 13:03:21| 分类： JS | 标签： |举报 |字号大中小订阅

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<script>
    //用js判断图片是否存在
    function checkPic(picUrl)
    {        
        if (window.ActiveXObject)
        {
            var oReq = new ActiveXObject("Microsoft.XMLHTTP");
        }
        else if (window.XMLHttpRequest)
        {
            var oReq = new XMLHttpRequest();
        }
        oReq.open("Get", picUrl, false);
        oReq.send();
        if (oReq.status == 404)
        {
            alert(' 图片不存在');
        }
        else
        {
            alert(' 图片存在');
        }
    }

</script>

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              blogAbstract:'<br\><pre class=\"prettyprint\"   \><br\><script><br\>    //用js判断图片是否存在<br\>    function checkPic(picUrl)<br\>    {        <br\>        if (window.ActiveXObject)<br\>        {<br\>            var oReq = new ActiveXObject(\"Microsoft.XMLHTTP\");<br\>        }<br\>        else if (window.XMLHttpRequest)<br\>        {<br\>            var oReq = new XMLHttpRequest();<br\>        }<br\>        oReq.open(\"Get\", picUrl, false);</pre\>',
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<#-- 网易新闻广告 --> <#--右边模块结构--> <#--评论模块结构--> <#--引用模块结构--> <#--博主发起的投票-->

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