2个有关问题js和gridview

2个问题js和gridview
1。我在gridview放了checkbox全选的列，可是运行后，该列没有显示
代码如下
<asp:GridView   ID= "gvComUnion "   runat= "server "   AllowPaging= "True "   AutoGenerateColumns= "False "
              BackColor= "White "   BorderColor= "#3366CC "   BorderStyle= "Solid "   BorderWidth= "1px "
              CellPadding= "4 "   Font-Size= "12px "   HorizontalAlign= "Left "   OnPageIndexChanging= "gvParty_PageIndexChanging "  
              OnRowEditing= "gvParty_RowEditing "   PageSize= "15 "   Width= "556px "   OnRowDataBound= "gvParty_RowDataBound "   OnLoad= "gvParty_Load "   OnRowCreated= "gvParty_RowCreated "   Font-Names= "宋体 "   OnSelectedIndexChanged= "gvComUnion_SelectedIndexChanged "   >
              <PagerSettings   FirstPageText= "第一页 "   LastPageText= "最后一页 "   Mode= "NextPreviousFirstLast "
                  NextPageText= "下一页 "   PreviousPageText= "上一页 "/>
              <FooterStyle   BackColor   =   "#EFEFEF "   ForeColor   =   "#000D47 "   />
                <Columns>
               
                        <asp:TemplateField>
                                <HeaderTemplate>
                                    <asp:CheckBox   ID= "CheckBox1 "   runat= "server "   Text= "全选 "   AutoPostBack= "true "   OnCheckedChanged= "CheckAll "   />
                                </HeaderTemplate>
                                <ItemTemplate>
                                    <asp:CheckBox   ID= "ItemCheckBox "   runat= "server "   />
                                </ItemTemplate>
                            </asp:TemplateField>


                        <asp:BoundField   DataField= "COMID "   HeaderText= "会员编号 "/>
                        <asp:BoundField   DataField= "COMNAME "   HeaderText= "单位名称 "   />
                        <asp:BoundField   DataField= "COMINLOW "   HeaderText= "所有制 "   />
                        <asp:BoundField   DataField= "BUSINESS "   HeaderText= "行业 "   />

                        <asp:BoundField   DataField= "DISTRICT "   HeaderText= "所在区 "   />
                        <asp:BoundField   DataField= "STATUS "   HeaderText= "状态 "     />
                        <asp:CommandField   EditText= "详细信息 "   HeaderText= "详细信息 "   ShowEditButton= "True "   />

                </Columns>

                <RowStyle   ForeColor= "#003399 "   HorizontalAlign= "Center "   />
                <SelectedRowStyle   BackColor= "#003399 "   Font-Bold= "True "   ForeColor= "#CCFF99 "   />
                <PagerStyle   BackColor= "#EFEFEF "   ForeColor= "#003399 "   HorizontalAlign= "Right "   />
                <HeaderStyle   BackColor= "#003399 "   BorderStyle= "None "   Font-Bold= "True "   ForeColor= "White "   />
                <AlternatingRowStyle   BackColor= "#EFEFEF "   />
               
        </asp:GridView>


问题2；
引用代码如下
<input   id= "Text1 "   type= "text "   onclick= "return   showCalendar( 'Text1 ',   'y-mm-dd '); "   onfocus= "return   showCalendar( 'Text1 ',   'y-mm-dd '); "   /> 此处不能换行 <img   src= "../images/1.gif "   alt= "选择日期 "   width= "25px "   height= "21px "     style= "CURSOR:   hand "   onclick= "return   showCalendar( 'Text1 ',   'y-mm-dd '); "   />
其中不能换行，否则运行无效，不知道为什么

[解决办法]
给你个好的：

<asp:TemplateField>
<EditItemTemplate>
<asp:CheckBox ID= "CheckBox1 " runat= "server " />
</EditItemTemplate>
<ItemTemplate>
<asp:CheckBox ID= "chbitem " runat= "server " />
</ItemTemplate>
<HeaderTemplate>
<input id= "chkAll " onclick= "javascript:SelectAllCheckboxes(this); "
runat= "server " type= "checkbox " />
</HeaderTemplate>
</asp:TemplateField>


function SelectAllCheckboxes(spanChk){

// Added as ASPX uses SPAN for checkbox
var oItem = spanChk.children;
var theBox= (spanChk.type== "checkbox ") ?
spanChk : spanChk.children.item[0];
xState=theBox.checked;
elm=theBox.form.elements;

for(i=0;i <elm.length;i++)

if(elm[i].type== "checkbox " &&
elm[i].id!=theBox.id)
{
//elm[i].click();
if(elm[i].checked!=xState)
elm[i].click();
//elm[i].checked=xState;
}
}