js监听页面的访问与折叠（用户离开页面和用户回到页面）

!function(){    
    document.addEventListener('visibilitychange',function(){
        let pageVisibility = document.visibilityState
        if (pageVisibility === 'hidden'){
            console.log('hidden')        
        }        
        if (pageVisibility === 'visible'){
        console.log('visible')            
        // document.location.reload()        
        }    
})}

js监听视频播放完成

    var video = document.getElementById("video")
    video.addEventListener("ended",function(){
        console.log('video ended')
        document.getElementById("video_div").style.display = "none"
        // 视频播放完成，展示表单
        document.getElementById("form_div").style.display = ''
    })

js向表单中插入新的数据，并控制表单提交

function formSubmit(){
    let form = $('#form')
    let serialInput = $("<input type='hidden' name='serial_code'>")                       
    serialInput.attr('value',this.getQueryVariable('serial_code'))
    let verifyInput = $("<input type='hidden' name='verification_code'>")    
    verifyInput.attr('value',this.getQueryVariable('verification_code'))    
    form.append(serialInput)
    form.append(verifyInput)
    console.log(form)
    form.submit();
}

js获取请求中的参数

function getQueryVariable(variable){
    var query = window.location.search.substring(1);
    var vars = query.split("&");
    for (var i=0;i<vars.length;i++) {
        var pair = vars[i].split("=");
        if(pair[0] === variable){return pair[1];}
    }
    return(false);
}