ASP.NET 一控件Textbox

Question

在 Textbox 中输入一行字，怎样实现当鼠标点击Textbox时，这里面的字消失

Answer 1

失去焦点的客户端事件是   onblur

Answer 2

用JS实现
JQuery实现
$("#textBox1").click(function(){
$(this).text("");
})

Answer 3

<asp:TextBox id="o" value="请输入搜索关键字" />document.onkeydown=function(){
           if(event.keyCode=="13")
           {    var user = '';
                if (user=="")
                {
                    if (document.getElementById("o").value=="请输入搜索关键字")
                    {
                    document.getElementById("Button2").click();         
                    return false;
                    }else
                    {
                   document.getElementById("btnQSearch").click();
                    return false;
                    }
                }else
                {
                     if (document.getElementById("o").value=="请输入搜索关键字"||document.getElementById("o").value=="")
                    {
                        alert("请输入搜索关键字");
                        return false;
                    }
                }
               }
            }
            

Answer 4

onclick  onfocus  都可以

Answer 5

 <asp:TextBox ID="TextBox1" runat="server" value="想找什么？输入名称试试" onfocus="if(value=='想找什么？输入名称试试'){value=''}"  onblur="if(value==''){value='想找什么？输入名称试试'}"  ></asp:TextBox>

Answer 6

onfocus="if (this.value=='请输入') this.value=''" onblur="if(this.value=='') this.value='请输入'"