HTML代码请把文件拖到下面的框里
触发drop事件
读取拖放的文件常用情况：
结合XMLHttpRequest和拖放文件实现上传
查看和管理本地文件和图片
<!DOCTYPE HTML> <html> <head> <style type="text/css"> #dropTarget {width: 200px; height: 200px; background: #ccc; border: 1px solid #999;} </style> </head> <body> <p>请把文件拖到下面的框里：</p> <div id="dropTarget"></div> <div id="output"></div> <script type="text/javascript"> function dragHandle(event) { var info = "", outputEle = document.getElementById("output"), files, i, len; event.preventDefault(); if(event.type == "drop") { files = event.dataTransfer.files; i = 0; len = files.length; while(i < len){ info += files[i].name + "( " + files[i].type + ", " + files[i].size + " bytes) <br>"; i++; } outputEle.innerHTML = info; } } var dropTargetEle = document.getElementById("dropTarget"); dropTargetEle.addEventListener("dragenter", dragHandle, false); dropTargetEle.addEventListener("dragover", dragHandle, false); dropTargetEle.addEventListener("drop", dragHandle, false); </script> </body> </html>