I have changed a bit in your code and written a javascript function to find checked value
plz check
function getSelectedMember(field, count)
{
var icount = document.getElementById(count).value;
for (var i = 0; i <icount; i++)
{
if (document.getElementById(field + i).checked == true)
{
alert(document.getElementById(field + i).value);
}
}
}
<div id="friend-list">
<h3>Grouop Member</h3>
<div style="height:190px; width:250px;margin-removed10px; text-align:left " id="Group-list">
<% if (groMoney.Services.UserGroupMemberSevices.get_grpMemberList(groMoney.Services.GroMoneyUserMemberService.getCurrentUser()).Rows.Count != 0)
{int i=0; %>
<% foreach (System.Data.DataRow MemberData in groMoney.Services.UserGroupMemberSevices.get_grpMemberList(groMoney.Services.GroMoneyUserMemberService.getCurrentUser()).Rows)
{%>
<ul>
<input id="check-name<%=i%>" type="checkbox" value="<%=MemberData[0]%>"title="Do you want to select member from group?" name="chk-name" /><%=MemberData[1]%>
</ul>
<% i++; } %>
<%} %>
</div>
<div class="lb-content-top">
<input type="text" id="txt" value="<%=i%>" style="visibility:hidden" /> //ADDED
<input class="button" style="cursor: pointer;left:20px;top: 2px;" type="button" value="View" name="delMember" tabindex="3" title="Delete selection" önclick="getSelectedMember('check-name', 'txt')" />
</div>
</div>
hope this will help you.