طلب صغير في التحكم بالبيانات المدخله على حقل

<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb" Inherits="_Default"
	 Culture="ar-SY" UICulture="ar" %>

 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 <html xmlns="http://www.w3.org/1999/xhtml">
 <head runat="server">
	 <title>Untitled Page</title>
	 <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">

	 <script language="javascript">

 function ValidateArabicInput(txtID) {
 var charout = "";
 var code = "";

 for(var i = 0; i < 
 document.getElementById(txtID).value.length;i++)
 {
	 code = document.getElementById(txtID).value.charCodeAt(i);
	 if ((code <1575 || code > 1610) && (code != 32)){
		 alert('please enter only arabic charater');
		 setColor(document.getElementById(txtID));   
		 document.getElementById(txtID).value=""
		 document.getElementById(txtID).focus();
		 return false
	 }
 }
 }// end function

 function ValidateEngilshInput(txtID) {
 var charout = "";
 var code = "";
 for(var i = 0; i < 
 document.getElementById(txtID).value.length;i++)
 {
	 code = document.getElementById(txtID).value.charCodeAt(i);
	 if ((code <65 || code > 122) && (code != 32)){
		 alert('please enter only english charater');
		 setColor(document.getElementById(txtID));   
		 document.getElementById(txtID).value=""
		 document.getElementById(txtID).focus();
		 return false
	 }
 }
 }// end function

 function ValidateDigitInput(txtID) {
 var charout = "";
 var code = "";

 for(var i = 0; i < 
 document.getElementById(txtID).value.length;i++)
 {
	 code = document.getElementById(txtID).value.charCodeAt(i);
	 if ((code <48 || code > 57) && (code != 32)){
		 alert('please enter only digital charater');
		 setColor(document.getElementById(txtID));   
		 document.getElementById(txtID).value=""
		 document.getElementById(txtID).focus();
		 return false
	 }
 }
 }// end function
 function setColor(elem){
 elem.style.backgroundColor='rgb(255,0,0)';
 }
 function clearColor(elem) {
 document.getElementById('txtarab').style.backgroundColor='rgb(255,255,255)';
 document.getElementById('txteng').style.backgroundColor='rgb(255,255,255)';
 document.getElementById('txtdigit').style.backgroundColor='rgb(255,255,255)';
 }

	 </script>

 </head>
 <body style="font: caption">
	 <form id="form1" runat="server">
		 <div>
			  </div>
		 <table>
			 <tr>
				 <td>
					 <asp:Label ID="Label1" runat="server" Text="only arabic"></asp:Label></td>
				 <td>
					 <asp:TextBox ID="txtarab" runat="server"></asp:TextBox></td>
				 <td style="width: 17px">
					 <asp:Button ID="Button1" runat="server" Text="valid" OnClientClick="java script:return ValidateArabicInput('txtarab');" /></td>
			 </tr>
			 <tr>
				 <td>
					 <asp:Label ID="Label2" runat="server" Text="only english"></asp:Label></td>
				 <td>
					 <asp:TextBox ID="txteng" runat="server"></asp:TextBox></td>
				 <td style="width: 17px">
					 <asp:Button ID="Button2" runat="server" Text="valid" OnClientClick="java script:return ValidateEngilshInput('txteng');" /></td>
			 </tr>
			 <tr>
				 <td>
					 <asp:Label ID="Label3" runat="server" Text="only digit"></asp:Label></td>
				 <td>
					 <asp:TextBox ID="txtdigit" runat="server"></asp:TextBox></td>
				 <td style="width: 17px">
					 <asp:Button ID="Button3" runat="server" Text="valid" OnClientClick="java script:return ValidateDigitInput('txtdigit');" /></td>
			 </tr>
			 <tr>
				 <td>
				 </td>
				 <td>
				 </td>
				 <td style="width: 17px">
				 </td>
			 </tr>
		 </table>
	 </form>
 </body>
 </html>

validition.zip