ASP. NET controls the input of numbers and letters

ASP. NET controls the input of numbers and letters

The distance between the input numbers and letters is determined through the JavaScript function,
First, add two labels and the corresponding textbox space in Aspx.
Then, enter
<Script language = "JavaScript" type = "text/JavaScript">
Function judgenumber (CODE)
{

If (code> = 48 & Code <= 57)
{
Return true;
}
Else
{
Return false;
}
}

Function judgechar (CODE)
{
 
If (code> = 65 & Code <= 90) | (code> = 97 & Code <= 122 ))
{
Return true;
}
Else
{
Return false;
}
}
</SCRIPT>

The onkeypress event of the textbox is as follows:
<Div>
Number: <asp: textbox id = "textbox4" runat = "server" onkeypress = "Return judgenumber (event. keycode);"> </ASP: textbox>
Letter: <asp: textbox id = "textbox5" runat = "server" onkeypress = "Return judgechar (event. keycode);"> </ASP: textbox>
</Div>