jQuery 验证文本框只能输入数字与小数点

$(document).ready(function() {
    $("#phoneNo").keydown(function(event) {
var keyCode = event.which;
if (keyCode == 46 || keyCode == 8 || keyCode == 190 || (keyCode >= 48 && keyCode <= 57) || (keyCode >= 96 && keyCode <= 105) || keyCode == 110) {
    return true;
} else { return false }
    }).focus(function() {
this.style.imeMode = 'disabled';
    });
    $("#input1").keydown(function(event) {
var keyCode = event.which;
if (keyCode == 46 || keyCode == 8 || keyCode == 190 || (keyCode >= 48 && keyCode <= 57) || (keyCode >= 96 && keyCode <= 105) || keyCode == 110) {
    return true;
} else { return false }
    }).focus(function() {
this.style.imeMode = 'disabled';
    });
});