<!DOCTYPE html>

 <html>

 <head>

     <title></title>

     <style type="text/css">

      #gridComboBox {

         background: #fff;

         border: 1px solid #2d78f4;

         border-radius: 2px;

         -moz-box-shadow: inset 0 0 4px #06c;

         -webkit-box-shadow: inset 0 0 4px #06c;

         box-shadow: inset 0 0 4px #06c;

     }

     </style>

 </head>

 <body>

     <input  onclick="doClick(this,'ddd(aa/bb/cc/erererer/dfdfdfdfdfdfdfdfdfdfdfdfdf/ejjejrjerjer//erererer ////////)eee')" />

     <input  onclick="doClick(this,'ddd(aa/bb/cc/erererer/dfdfdfdfdfdfdfdfdfdfdfdfdf/ejjejrjerjer//erererer ////////)eee')" style='width: 300px;' />

     <p><b>Needed Properties:</b> sender.offsetTop & sender.offsetLeft & sender.offsetHeight</p>

 </body>

 </html>

 <script type="text/javascript">

 function delGridComboBox() { // 删除弹出框

     var divContainer = document.getElementById('gridComboBox');

     if (divContainer) {

         divContainer.parentNode.removeChild(divContainer);

     }

 }

 function doClick(sender, str) {//str='ddd(aa/bb/cc/erererer/dfdfdfdfdfdfdfdfdfdfdfdfdf/ejjejrjerjer//erererer ////////)eee' 只取()得内容/分割做为数据源

     delGridComboBox();

     // console.log(sender);

     // for(var i in sender)

     // {

     //     console.log(i+"|"+sender[i]);

     // }

     var re = /[^\)\(]*/g //取出()中的内容作为下拉数据源

     var fit = str.match(re);

     var fmt = fit[2].split('/');

     var divContainer = document.createElement('div');

     divContainer.style.width = sender.clientWidth + 2 + "px";

     divContainer.style.overflow = "hidden";

     divContainer.style.position = 'absolute';

     divContainer.style.top = sender.offsetTop + sender.offsetHeight + 'px';

     divContainer.style.left = sender.offsetLeft + 'px';

     divContainer.style.zIndex = 999;

     divContainer.id = "gridComboBox";

     for (var i = 0; i < fmt.length; i++) {     

         console.log('fmt[i]>>', fmt[i]);

         var txt = document.createElement('div');

         txt.innerHTML = fmt[i];

         txt.title = txt.innerHTML;

         txt.style.margin = 3+'px';

         txt.addEventListener('mouseover', function changeBg(event) {

             event.target.style.fontWeight = 'bold';

             event.target.style.color = 'white';

             event.target.style.backgroundColor = '#2d78f4';

         }, false);

         txt.addEventListener('mouseout', function unChangeBg(event) {

             event.target.style.fontWeight = 'normal';

             event.target.style.color = 'black';

             event.target.style.backgroundColor = 'white';

         }, false);

         txt.onclick = function(subSender) {

             sender.value = subSender.target.innerText;

             delGridComboBox();

         };

         divContainer.appendChild(txt);

     };

     document.body.appendChild(divContainer);

 };

 </script>