< input type="button" value="delete" onclick=" if(confirm('确定要删除吗')) location.href= 'del_03.php?id=xing'">< br/> < script language="JavaScript" type="text/javascript"> function select(obj){ window.location.href='del_04.php?myselect= '+obj.options[obj.selectedIndex].value; return; //可以不写; } < /script> < input type="button" value="delete" onclick="if(confirm('确定要删除吗')) location.href='del_03.php?id=xing'">< br/> < form name="myform" action="del_04.php" method="post"> < !-- 直接触发onchange 事件 ,此时不用提交表单,-- > < !--< select name="selectID" onchange= "location='del_04.php?myselect='+this.options [this.selectedIndex].value">--> < !-- 把onchange 的事件写在一个函数里面-- > < select name="selectID" onchange="select(this)"> < !-- < select name="selectID" >--> < option value="0">请选择< /option> < option value="value1">option1< /option> < option value="value2">option2< /option> < option value="value3">option3< /option> < /select> < input type="submit" name="sendSelect" value="提交下拉框"/> < /form>