For entering number only in textbox

Javascript:

f

unction numbersonly(e){

var unicode=e.charCode? e.charCode : e.keyCode

if (unicode!=8 && unicode!=46 && unicode!=9){ 

if (unicode<48||unicode>57) 


return false 

}

Call this function (numberonly(e)) in textbox's onkeypress event,

<asp:TextBox ID="txtPostalCode" class="contentTblTxtBox" onkeypress="return numbersonly(event);" MaxLength="100" runat="server"></asp:TextBox>