<!doctype html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title> </head> <body> <select id="objsel" name="objsel" size=8 multiple> <option value="0" selected>请选择 <option value="1">测试一 <option value="2">测试二 <option value="3">测试三 <option value="4">测试四 <option value="5">测试五 </select> <input type="button" onclick="checkselect();" value="输出"> 选中的项目：<input type="text" id="output" name="output"> </body> </html> <script language="JavaScript"> function checkselect(){ var x = document.getElementById("objsel"); var t = document.getElementById("output"); var count=0; var intvalue=""; for(i=0;i<x.length;i++){ if(x.options[i].selected){ intvalue+=x.options[i].value+","; count++; } } t.value=intvalue.substr(0,intvalue.length-1); // alert(count); } </script>
效果图：
