JavaScript

Check The Validation For Number

  1. <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">  
  2. <html>  
  3.    <head>  
  4.       <title>Sample Code</title>  
  5.       <script type="text/javascript">  
  6.          function  CheckNumeric(ValueNumeric)  
  7.          {  
  8.             var objRegex = /(^-?\d\d*\.\d\d*$)|(^-?\d\d*$)|(^-?\.\d\d*$)/;  
  9.            
  10.             //check for numeric characters  
  11.               
  12.               
  13.             if(objRegex.test(ValueNumeric))  
  14.             {  
  15.                 alert("Your Given Input Is \""+ValueNumeric+"\" Correct.");  
  16.             }  
  17.             else  
  18.             {  
  19.                 alert("Your Given Input Is Not \""+ValueNumeric+"\" Correct.");  
  20.             }  
  21.          }  
  22.       </script>  
  23.    </head>  
  24.    <body bgcolor=#00ff00 alink=blue vlink=blue>  
  25.       <FORM name="windowEvent">  
  26.          Number : <input type="text" name="txtnumber" />  
  27.          <input type="button" value="Check Number" name="btnNumber" onClick="CheckNumeric(txtnumber.value)" />  
  28.       </FORM>  
  29.    </body>  
  30. </html> 
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