//我想实现当DropDownList2的值是"--不选--"时,删除textbox1的onfocus事件
//当值是"竣工时间"时textbox1增加onfocus事件并指向WdatePicker()函数
//当值是"名称"时textbox1增加onfocus事件并指向crdiv()函数
//现在问题是增加事件没有问题,但就是删除不了,如何修改 function onchange1()
{
var drp2 = document.getElementById("DropDownList2");
var v = drp2.options[drp2.selectedIndex].innerText;
var o = document.getElementById("TextBox1");
var ev1 = function(){WdatePicker()};
var ev2 = function(){crdiv(o,'Windows|Mac Os|Linux|Unix')};
// document.getElementById("TextBox1").onfocus=null;
o.detachEvent("onfocus",ev1);
o.detachEvent("onfocus",ev2);
if (v == "--不选--")
{
o.detachEvent('onfocus',ev1);
o.detachEvent('onfocus',ev2);
}
if (v == "竣工日期") o.attachEvent('onfocus', ev1);
if (v == "名称") o.attachEvent('onfocus', ev2);
}
//当值是"竣工时间"时textbox1增加onfocus事件并指向WdatePicker()函数
//当值是"名称"时textbox1增加onfocus事件并指向crdiv()函数
//现在问题是增加事件没有问题,但就是删除不了,如何修改 function onchange1()
{
var drp2 = document.getElementById("DropDownList2");
var v = drp2.options[drp2.selectedIndex].innerText;
var o = document.getElementById("TextBox1");
var ev1 = function(){WdatePicker()};
var ev2 = function(){crdiv(o,'Windows|Mac Os|Linux|Unix')};
// document.getElementById("TextBox1").onfocus=null;
o.detachEvent("onfocus",ev1);
o.detachEvent("onfocus",ev2);
if (v == "--不选--")
{
o.detachEvent('onfocus',ev1);
o.detachEvent('onfocus',ev2);
}
if (v == "竣工日期") o.attachEvent('onfocus', ev1);
if (v == "名称") o.attachEvent('onfocus', ev2);
}
o.detachEvent('onfocus',ev1);
var ev1 = function(){alert("ev1");};
var ev2 = function(){alert("ev2");};
function onchange1()
{
var drp2 = document.getElementById("DropDownList2");
var v = drp2.options[drp2.selectedIndex].innerText;
var o = document.getElementById("TextBox1");
// document.getElementById("TextBox1").onfocus=null;
o.detachEvent("onfocus",ev1);
o.detachEvent("onfocus",ev2);
if (v == "竣工日期") {o.attachEvent('onfocus', ev1);}
if (v == "名称") {o.attachEvent('onfocus', ev2); }
}