var regu = "^([0-9]*[.0-9])$"; // 小数测试
var re = new RegExp(regu);
var number=12.12;
if(number.search(re) == -1){
alert("此数字为小数");
}
var re = new RegExp(regu);
var number=12.12;
if(number.search(re) == -1){
alert("此数字为小数");
}