<script>
function checkb(flag){ var boxs=document.getElementsByName("jiage"); for(i=0;i<boxs.length;i++) { var val=boxs[i].value; if(val==flag) { }else { boxs[i].checked=false; } } }
</script>
<html>
<head>
<head>
<body>
<input type="checkbox" id="bianzhijia" name="jiage" value="bianzhijia" οnclick="checkb('bianzhijia')">
<input type="checkbox" id="sonshenjia" name="jiage" value="sonshenjia" οnclick="checkb('sonshenjia')">
<input type="checkbox" id="shendinjia" name="jiage" value="shendinjia" οnclick="checkb('shendinjia')">
<input type="checkbox" id="hejianjia" name="jiage" value="hejianjia" οnclick="checkb('hejianjia')">
</body>
</html>
