//jquery控制input只能输入数字和两位小数<br>function num(obj){<br> obj.value = obj.value.replace(/[^\d.]/g,""); //清除"数字"和"."以外的字符<br> obj.value = obj.value.replace(/^\./g,""); //验证第一个字符是数字<br> obj.value = obj.value.replace(/\.{2,}/g,"."); //只保留第一个, 清除多余的<br> obj.value = obj.value.replace(".","$#$").replace(/\./g,"").replace("$#$",".");<br> obj.value = obj.value.replace(/^(\-)*(\d+)\.(\d\d).*$/,'$1$2.$3'); //只能输入两个小数<br>}