function IsFloatByBit 

(value, state, bit) {

           

if

(state ==

false

) {

               

var

reg =

new

RegExp(

"^\\d+(\\.\\d{"

+ bit +

"})*$"

,

"ig"

);

               

return

reg.test(value);

            }

else

{

               

var

reg =

new

RegExp(

"^[-]?\\d+(\\.\\d{"

+ bit +

"})*$"

,

"ig"

);

               

return

reg.test(value);

            }

        }