项目中用到的正则

str.replace(/[^\d.]+/g,‘‘).replace(‘.‘,‘$#$‘).replace(/\./g,‘‘).replace(‘$#$‘,‘.‘).replace(/^\./g,‘‘)

str.replace(/[^\a-\z\A-\Z0-9\u4E00-\u9FA5]/g,‘‘)

str.value.replace(/\D/g,‘‘)

<input type=‘text‘ onkeyup=‘checkDate(this.value,jQuery(this))‘ onblur=‘blurdate(this.value,jQuery(this))‘ >

function checkDate(date,a){
    if(date.length==10){
        var reg = /^(\d{1,4})(-)(\d{1,2})\2(\d{1,2})$/;
        var r = date.match(reg);
        if(r==null){
            swal({
                title: "您输入的日期格式不正确!",
                timer: 1300,
                type:"warning",
                showConfirmButton: false
            });
            a.val("")
        }else{
            var d = new Date(r[1], r[3] - 1, r[4]);
            var c=(d.getFullYear() == r[1] && (d.getMonth() + 1) == re[3] && d.getDate() == r[4]);
            if(!c){
                swal({
                    title: "请输入正确的日期!",
                    timer: 1300,
                    type:"warning",
                    showConfirmButton: false
                });
                a.val("");
            }
        }
    }
}
function blurdate(date,a){
    if(date!=""){
       if(date.length<10){
            swal({
                    title: "您输入的日期格式不正确!",
                    timer: 1300,
                    type:"warning",
                    showConfirmButton: false
                });
            a.val("")
            a.parent().parent().find("input[type=hidden]").val("");
        }
    }
}