复选框onclick改变value值
<input   onclick= " "   type= "checkbox "   value= "false "   name= "top "   />

想用onclick事件来循环改变value值，checked的时候value=true否则value=false

语句应该怎么写

------解决方案--------------------
<input onclick= "this.value=this.checked? 'true ': 'false ' " type= "checkbox " value= "false " name= "top " >