(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)})}