text: window.onload = function(){
  	console.log('start page...');
  	const upload = document.querySelector('#upload');
  	upload.onchange = function(){
  		const imgDiv = document.querySelector('#img-div');
  		const imgObj = imgDiv.querySelectorAll('img')[0];
  		if(this.files.length > 0){
  			document.querySelector('#upload-name').value = this.files[0].name;
  			var tempUrl = window.URL.createObjectURL(this.files[0]);
  			imgObj.src = tempUrl;
  			imgDiv.style.display = 'block';
  		}else{
  			document.querySelector('#upload-name').value = '';
  			imgObj.src = '#';
  			imgDiv.style.display = 'none';
  		}
  	};
  };