<style>
.upload{
    padding: 4px 10px;
    height: 20px;
    line-height: 20px;
    position: relative;
    text-decoration: none;
    color: #4d90d3;
    cursor: pointer;
}
.replyFileid{
    width:100%;
    position: absolute;
    overflow: hidden;
    right: 0;
    top: 0;
    filter:alpha(opacity=0);
    -moz-opacity:0;
    -khtml-opacity: 0;
    opacity: 0;
    cursor: pointer;
}
.upload span{
    color:#999;
    cursor: pointer;
}
</style>

<a href="javascript:void(0);" class="upload" onclick='javascript:$("#smms_pick").click();'>选择文件  <span id="cxtinfo">未选择任何文件</span>
    <input class="replyFileid" type="file" onchange="smms_cpick1()" id="smms_pick" accept="image/jpeg,image/png,image/gif" style="display:none"/>
</a>

function smms_cpick(){
    if(!document.getElementById('smms_pick').files.length){return;};
    $("#cxtinfo").text(document.getElementById('smms_pick').files[0].name);
    console.log(document.getElementById('smms_pick').files[0].name);
    var myfd=new FormData();myfd.append('file',document.getElementById('smms_pick').files[0]);
        myfd.append("Token","ef03c586c8245c438761a76773d5faf201ebbf19:KsmRlHun4Ea:eyJkZWFkbGluZSI6MTU3NzM3NDAyMCwiYWN0aW9uIjoiZ2V0IiwidWlkIjoiNzAzMTc1IiwiYWlkIjoiMTY0MzQ3NyIsImZyb20iOiJmaWxlIn0=");
    var ajax=$.ajax({url:'http://up.imgapi.com/',type:'POST',processData:false,contentType:false,data:myfd,success:function(res){
        if (res.linkurl){$("#beizhu").val(res.linkurl);}
    }
    });
}