Simple JS function to Accept Decimals in to text box on Visualforce page

Hi Floks ,

Here I am giving the simple JS function , which will accept decimals in to text box on visualforce page,

JS code snippet :

function IsDecimal(myField, e) { 
       var keynum;
       var keychar;
       var numcheck;    
       if (window.event) // IE
       { 
           keynum = e.keyCode;
       }
       else if (e.which) // Netscape/Firefox/Opera
       {
           keynum = e.which;
       }     
       var charCode = (e.which) ? e.which : event.keyCode
       if(charCode != 46){         
           if (charCode > 31 && (charCode < 48 || charCode > 57))  
              return false;
       }
       if(e.which==0)  
        return true;    
       keychar = String.fromCharCode(keynum);       
       if (keychar == '.') { 
           var val = myField.value;
           if (val.split(keychar).length > 1)
               return false;
       }
       
       return true;
   }


How to call :

 <apex:inputText value="{!dtest}"  id="testID" onkeypress="return IsDecimal(this,event)" /> 


Thank you.