Restrict Space and Special Character using Javascript

By Vaibhav Kale Feb 04, 2013
This blog shows how to restrict users from entering space and special character in textbox using Javascript.

function RestrictSpaceSpecial(e) {
    var k;
    document.all ? k = e.keyCode : k = e.which;
    
return
 ((k > 64 && k < 91) || (k > 96 && k < 123) || k == 8 || k == 32 || (k >= 48 && k <= 57));
}

Now access the JavaScript function on keypress event of textbox as shown below:

<asp:TextBox ID="TextBox2" runat="server" onkeypress="RestrictSpaceSpecial();" />

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