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Check the Validation for floating point numbers in HTML

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