Use jquery implementation to verify whether the input is a number, decimal, containing a few decimal _jquery

1, the authentication method Validationnumber (E, num) e is the label object, and Num stands for the number of decimal digits.

function Validationnumber (e, num) {
      var regu =/^[0-9]+\.? [0-9]*$/;
      if (E.value!= "") {
        if (!regu.test (E.value)) {
          alert ("Please enter 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, verify the integer

<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 a 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. Keep two decimal digits

<asp:textbox id= "Txtstdyr" name= "Txtstdyr" runat= "Server" height= "16px" width= "98px" font-size= "9pt" 
   CssClass = "Edittextbox" onpropertychange= "Validationnumber (this,2)" ></asp:TextBox>

5. Keep three decimal digits

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

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

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