function settext1(val) { document.getElementById('<%=Label6.ClientID%>').innerHTML = val; }
<asp:TextBox id="txtbox1" runat="server" class="water" Text="Text Line 1" Tooltip="Enter Text" onkeypress="settext1(this.value)"></asp:TextBox><br />
<asp:TextBox id="txtbox1" runat="server" class="water" Text="Text Line 1" Tooltip="Enter Text" onkeyup="settext1(this.value)"></asp:TextBox><br />
var
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