Email validation using javascript

function EmailValidate() {

var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
var address = document.getElementById("txtEmail").value;
if (reg.test(address) == false) {

alert('Invalid Email Address');
return false;
}
}


asp:TextBox ID="txtEmail" runat="server">

asp:Button ID="Button1" runat="server" Text="Validate" OnClientClick="return Validate();"

How to allow only numbers into textbox using javascript, asp.net , Allow only numbers validation using javascript

function numbersonly(e) {
var unicode = e.charCode ? e.charCode : e.keyCode
if (unicode != 8) { //if the key isn't the backspace key (which we should allow)
if (unicode < 48 || unicode > 57) //if not a number
return false //disable key press
}
}



asp:TextBox ID="tbxBkgRefNo" runat="server" onkeypress="return numbersonly(event);"