(function(){
$("body").prepend("<div id='wusdiv'></div>")
})();
function addtextag(callback,dtext='......',id='wusinput',btext="Start"){
$("#wusdiv").append(`<textarea rows="3" cols="80" id='${id}'>${dtext}</textarea>&nbsp;&nbsp;<button id='b${id}'>${btext}</button></br>`)
$(`#b${id}`).click(function(){
val=$(`#${id}`).val()
if(val==dtext){
alert("you can input some vaild text for youself!")
return
}
console.log(`get the val: "${val}" ,then and run the callback`)
callback(val)
})
}
function addfiletag(callback,id='wusfile'){
$("#wusdiv").append(`<input type="file" id="${id}"/></br>`)
$(`#${id}`).change(function(){
callback(this.files)
})
}