<form name="f1">a:<input type="checkbox" name="n1" value="a" title="1"><br/>b:<input type="checkbox" name="n1" value="b" title="1"><br/>c:<input type="checkbox" name="n1" value="c" title="1"><br/><input type="button" id="b" value="tijiao"></form><script type="text/javascript"> var b = document.getElementById("b"); b.onclick = function(){ var chV=""; var inputElements =document.getElementsByTagName("input"); for(var i=0; inputElements[i]; ++i){ if(inputElements[i].name==="n1" && inputElements[i].checked){ chV+=inputElements[i].value+","; } } alert(chV.substring(0,chV.length-1)); };</script>
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