only number key in javascript




<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
<script>
function IsNumber(evt,x)
 {

         var charCode = (evt.which) ? evt.which : event.keyCode ; //alert(charCode);

if(charCode != 46 && charCode != 45){ // . = 46 , - = 45
         if ((charCode > 31 && (charCode < 48 || charCode > 57)) )
            return false;
//alert($('#txtts').val());
var s= $(x).val().split('.') ; if(s[1].length > 1){ return false ;};
         return true;
}else
if(charCode==45){ if($(x).val().length!=0) return false ; }

 if(charCode==46){
 if($(x).val().indexOf('.')!='-1'){ return false ;};
 }

var s= $(x).val().split('.') ; if(s[1].length > 1){ return false ;};
return true;
      }
</script>
 <input type="text" name="t" id="t" onkeypress="return IsNumber(event , this);" /></td>
 

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