<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button"
OnClientClick="alert('客房端验证，阻止向服务器端提交');return false;" />

this.TextBox1.Attributes.Add("onchange",
"alert('数据被改动，现检查输入是否符合规则');");

this.TextBox1.Attributes.Add("readOnly", "true");

<script type="text/javascript" src="JScript.js" language="javascript"></script>
<script type="text/javascript" language="javascript">
function fn_Name()
{
    alert("JS");
}
</script>

this.RegisterClientScriptBlock("jsFile",
"<script type='text/javascript' src='JScript.js' language='javascript'></script>");
[code]

5.点击按钮时 相关栏位 非空判断

[code]
function checkEmpty(txtObj,msgShow)
{
    if(txtObj.value == "")
    {
        alert(msgShow);
        return false;
    }
}
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button"
OnClientClick="return checkEmpty(TextBox1,'TextBox1 不能为空')" />

function chkTextBox(chkObj,txtObj)
{
    if(chkObj.checked==true)
    {
        txtObj.value = "";
        txtObj.readOnly = false;   
        txtObj.focus();
    }
    if(chkObj.checked == false)
    {
        txtObj.value = "";
        txtObj.readOnly = true;    
    }
}
<input id="Checkbox1" type="checkbox" onclick="chkTextBox(Checkbox1,TextBox1)" />

var EnCodeQueryName = escape(Name);
var strPara = "'dialogWidth: 400px;dialogHeight: 400px;dialogLeft: 300px;dialogTop: 200px;toolbar: no;menubar: no;resizable: yes;location: no;status: no;scrollbars= no'";
var ReturnInfo = window.showModalDialog("QryName.aspx?&Name="+EnCodeQueryName +"&QueryID="+QueryType+"",'',strPara);
if(ReturnInfo !=null)
{
    var arrayReturnInfo = ReturnInfo .split("@");
    document.all.drpID.value = arrayReturnInfo[1];
    document.all.txtName.value= arrayReturnInfo[2];
}

if(confirm('确认如何吗?'))
{
  document.all.hidbtn_Submit.click();
}
else
{
  document.all.hidbtn_Cancel.click();
}

<input id="hidbtn_Submit" type="button" value="确认修改"
style="display:none;"
onserverclick="hidbtn_Submit_ServerClick"
runat="server" />

#region 添加页面对快捷键的响应
string strJS_ShortKey = "<script language='javascript' type='text/javascript' > ";
strJS_ShortKey += " document.onkeydown=shortKeyDown; ";
strJS_ShortKey += " function shortKeyDown()  ";
strJS_ShortKey += " { ";
// 新增
if (this.ButtonCtl1.ImgBtn_AddFamily.Visible)
{
    string btnInsertCID = this.ButtonCtl1.ImgBtn_Insert.ClientID.Trim();
    //F2 - 113
    strJS_ShortKey += " if(event.keyCode=='113') ";
    strJS_ShortKey += "  { ";
    strJS_ShortKey += "    document.all('" + btnInsertCID + "').click();";
    strJS_ShortKey += "    event.keyCode= 0; ";
    strJS_ShortKey += "    event.returnValue = false; ";
    strJS_ShortKey += "    return false; ";
    strJS_ShortKey += "  } ";
}
// 修改
if (this.ButtonCtl1.ImgBtn_Edit.Visible)
{
    string btnEditCID = this.ButtonCtl1.ImgBtn_Edit.ClientID.Trim();
    //F3 - 114
    strJS_ShortKey += " if(event.keyCode=='114') ";
    strJS_ShortKey += "  { ";
    strJS_ShortKey += "    document.all('" + btnEditCID + "').click();";
    strJS_ShortKey += "    event.keyCode= 0; ";
    strJS_ShortKey += "    event.returnValue = false; ";
    strJS_ShortKey += "    return false; ";
    strJS_ShortKey += "  } ";
}
strJS_ShortKey += " } ";
//注册事件
Page.RegisterStartupScript("shortKey", strJS_ShortKey);
#endregion

alert('aaa \r\n bbb \r\n ccc');

string strAlertContent = "aaa"+" \\r\\n ";
strAlertContent += "bbb" +" \\r\\n ";

//用查询得的数据集进行绑定
if (dt.Rows.Count > 0)
{
    //绑定
    this.gv_InfoFromSendModule.DataSource = dt;
    this.gv_InfoFromSendModule.DataBind();
    //确定按钮显示
    this.btn_OK.Visible = true;
    this.txthid_RowCount.Text = dt.Rows.Count.ToString();
}
//GridView的RowDataBound
protected void gv_InfoFromSendModule_RowDataBound(object sender, GridViewRowEventArgs e)
{
   if (e.Row.RowIndex < 0)
      return;
   e.Row.Attributes.Add("onclick", "radButton('" + e.Row.RowIndex.ToString() + "','" + e.Row.Cells[1].Text.Trim() + "');");
   //RadioButton rad = (RadioButton)e.Row.Cells[0].FindControl("rad_Select");
   //rad.Attributes.Add("onclick", "radButton('"+e.Row.RowIndex.ToString()+"','"+ e.Row.Cells[1].Text.Trim()+"');");
}
//行上所绑定的JS
function radButton(rowIndex,rowGUID)
{
    //gv_InfoFromSendModule$ctl02$rad_Select
    var rowCount = parseInt(document.all.txthid_RowCount.value)+2;
    for(var i=2;i<rowCount;i++)
    {
        var tmpName;
        if(i<10)
        {
            tmpName = "gv_InfoFromSendModule$ctl0"+i+"$rad_Select";              
        }
        else
        {
            tmpName = "gv_InfoFromSendModule$ctl"+i+"$rad_Select";  
        }
        //取得对应的Radio对象
        var tmpRadio = document.getElementById(tmpName);
        //当前选中 其他取消选中
        if((i-2) == rowIndex)
        {                
            tmpRadio.checked = true;
        }
        else
        {
            tmpRadio.checked = false;
        }
    }
    document.all.txthid_GUID.value = rowGUID;
}

function fn_Trim(obj)
{
    if(obj==null)
    {
       return;
    }
    else
    {
        var oldStr = obj.value;
        var newStr = oldStr.replace(/^\s+|\s+$/g,"");
        obj.value = newStr;
    }     
}

function fn_IsTooLong(obj,varLength)
{
    if(obj==null)
    {
       return false;
    }
    else
    {
        var valueStr = obj.value;
        var len = valueStr.match(/[^ -~]/g) == null ? valueStr.length : valueStr.length + valueStr.match(/[^ -~]/g).length ;
        if(len > parseInt(varLength) )
        {
            return true;
        }
        else
        {
            return false;
        }
    }     
}