jquery控制input只能输入数字和两位小数

2017-02-17 15:53:29

jquery代码

复制代码

function num(obj){
obj.value = obj.value.replace(/[^\d.]/g,""); //清除"数字"和"."以外的字符obj.value = obj.value.replace(/^\./g,""); //验证第一个字符是数字obj.value = obj.value.replace(/\.{2,}/g,"."); //只保留第一个, 清除多余的obj.value = obj.value.replace(".","$#$").replace(/\./g,"").replace("$#$",".");
obj.value = obj.value.replace(/^(\-)*(\d+)\.(\d\d).*$/,'$1$2.$3'); //只能输入两个小数}

复制代码

限制只能保留两位小数点

<input type="text" onkeyup="num(this)" size="10"/>元

限制只能输入数字

<input type="text"onkeyup='this.value=this.value.replace(/\D/gi,"")'/>

 


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