js 金额格式

Question

要求在Input中只能输入数字，小数点，负号
例如1231.25 或-1231.25
并切在输入完成后将数字格式化成带有千分位与美元符号格式例
$1，231.25请大家帮帮忙谢谢

Answer 1

那楼主根据charcode来判断就可以了，就是每次输入的只能是对应得Unicode键值，比如回车键是27，楼主来控制下就可以了

Answer 2

<input onkeyup="value=value.replace(/[^\d\.]/g,'')"> 只能输入数字和小数点

Answer 3

参考如下代码：
(function () {
    var str = "1245678.123";
    if (!/^-?\d+(\.\d+)*$/.test(str)) {
        alert("格式不正确");
        return;
    }
    while (/(\d)(\d{3})([,\.])/.test(str))
        str = str.replace(/(\d)(\d{3})([,\.])/g, "$1,$2$3");
    alert("$" + str);
})();

Answer 4

<input onkeyup="value=value.replace(/[^\d\.]/g,'')"> 
var moneyFormatter:CurrencyFormatter = new CurrencyFormatter(selectedLocale);moneyFormatter.setCurrency("USD", "$");
var valueText:String = moneyFormatter.format(123456.25);

Answer 5

<script>
window.onload=function(){
    var obj=document.getElementById("txt1");
    obj.onkeypress=function(){
        var v=String.fromCharCode(event.keyCode);
            v=this.value+v;
        if(!v.match(/^-|-?\d+([.]\d+)?/))return false;
    }
    obj.onblur=function(){
        this.value="$"+this.value.replace(/([\d]+?)(?=(?:\d{3})+$)/g,"$1,");
    }
}
</script>
<input id=txt1>

Answer 6

又改了一下
<script>
window.onload=function(){
    var obj=document.getElementById("txt1");
    obj.onkeypress=function(){
        var v=String.fromCharCode(event.keyCode);
            v=this.value+v;
        if(!v.match(/^-|-?\d+([.]\d+)?/))return false;
    }
    obj.onblur=function(){
        this.value="$"+this.value.replace(/([\d]+?)(?=(?:\d{3}([.]\d+)?)+$)/g,
            function($0,$1,$2,lastIndex,str){
                if(str.substring(0,lastIndex+4).indexOf(".")!=-1)return $1;
                return $1+",";
            });
    }
}
</script>
<input id=txt1>1234567890a

Answer 7

哎~不对啊都有好多问题 shan1119 给的 #￥@#%……%@#这些字符都可以输进去我是个Js白痴大家帮帮忙吧

Answer 8

<script>
window.onload=function(){
    var obj=document.getElementById("txt1");
    obj.onkeypress=function(){
        var v=String.fromCharCode(event.keyCode);
            v=this.value+v;
        if(!v.match(/^-$|-?\d+([.]\d+)?$/))return false;
    }
    obj.onblur=function(){
        this.value="$"+this.value.replace(/([\d]+?)(?=(?:\d{3}([.]\d+)?)+$)/g,
            function($0,$1,$2,lastIndex,str){
                if(str.substring(0,lastIndex+4).indexOf(".")!=-1)return $1;
                return $1+",";
            });
    }
}
</script>
<input id=txt1>1234567890a

Answer 9

<script>
window.onload=function(){
    var obj=document.getElementById("txt1");
    var flg=false;
    obj.onfocus=function(){flg=false;};
    obj.onkeypress=function(){
        var v=String.fromCharCode(event.keyCode);
            v=this.value+v;
            flg=false;
        if(!v.match(/^-$|^-?\d+[.]$|^-?\d+([.]\d+)?$/))return false;
        flg=true;
    }
    obj.onblur=function(){
        if(!flg)return;
        this.value="$"+this.value.replace(/([\d]+?)(?=(?:\d{3}([.]\d+)?)+$)/g,
            function($0,$1,$2,lastIndex,str){
                if(str.substring(0,lastIndex+4).indexOf(".")!=-1)return $1;
                return $1+",";
            });
    }
}
</script>
<input id=txt1>1234567890a

Answer 10

可悲了~估计是IE了我的是IE8 我们要求支持IE8

Answer 11

哦我知道了~谢谢啊好像是有点用~但是问题出在你定义哪个Flag上面
如果离开过一次下次就不好用了。

Answer 12

还是有点Bug我试着自己调试一下~如果兄弟有时间也帮我改一改好吗谢谢了

Answer 13

<script>
function $(id){return document.getElementById(id)}
function test(o){
  var s=o.value,  b=false;
  if(s.length==0)return
  if(s.indexOf('$')!=-1){s=s.substr(1,s.length);  s=s.replace(/,/g,'');  }
  if(!s.match(/^(\-|\+)?\d*\.?\d*$/gi)){alert("请输入数字");o.select();  return; }
  while (/(\d)(\d{3})([,\.])/.test(s)){
    s = s.replace(/(\d)(\d{3})([,\.])/g, "$1,$2$3");  b=true
  }
  if(b){o.value='$'+s} 
}
</script>
<input type=text id=a name=a value='' onkeyup='test(this)' /><br>