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