Verifies whether the input is a number, a decimal, and contains a few decimals reserved

1. Verification Method Validationnumber (E, NUM) e represents the Label object, and Num represents the number of decimal digits reserved

function Validationnumber (e, num) {varRegu =/^[0-9]+\.? [0-9]*$/; if(E.value! ="") {                if(!regu.test (E.value)) {Alert ("Please enter the correct number"); E.value= E.value.substring (0, E.value.length-1);                E.focus (); } Else {                    if(num = =0) {                        if(E.value.indexof ('.') >-1) {E.value= E.value.substring (0, E.value.length-1);                        E.focus (); }                    }                    if(E.value.indexof ('.') >-1) {                        if(E.value.split ('.')[1].length >num) {E.value= E.value.substring (0, E.value.length-1);                        E.focus (); }                    }                }            }        }

2. Verifying integers

<asp:textbox id="txtng"Name="txtng"runat="Server"height="16px"Width="98px"Font-size="9pt"CssClass="Edittextbox"Onpropertychange="Validationnumber (this,0)"></asp:TextBox>

3. Keep One decimal

<asp:textbox id="Txtchglinecost"Name="Txtchglinecost"runat="Server"height="16px" Width="98px"Font-size="9pt" 
cssclass="Edittextbox"Onpropertychange="Validationnumber (this,1)"></asp:TextBox>

4. Retain two decimal places

<asp:textbox id="Txtstdyr"Name="Txtstdyr"runat="Server"height="16px"Width="98px" Font-size="9pt" 
cssclass="Edittextbox"Onpropertychange="Validationnumber (this,2)"></asp:TextBox>

5. Retain three decimal places

You only need to change the second parameter in the Validationnumber (this,3) method to 3.

Keep Four decimal places, keep five decimal places, etc...

Verify that the input is numeric, fractional, and contains several decimals reserved