function ValidPrice(obj)

{ s = obj.value;

//var reg = /^[0-9]*\.[0-9]{0,2}$/;

var reg = /^[0-9]+([.]{1}[0-9]{1,2})?$/;

if (!reg.test(s))

{

obj.value = "";

alert("必须为>=0的金额，精确到小数点后2位!");

obj.focus();

obj.select();

return false;

}

return true;

}