1、函数(保留两个小数
function checkNum(obj){
obj.value = obj.value.replace(/[^\d.]/g,"");
obj.value = obj.value.replace(/^\./g,"");
obj.value = obj.value.replace(/\.{2,}/g,".");
obj.value = obj.value.replace(".","$#$").replace(/\./g,"").replace("$#$",".");
obj.value = obj.value.replace(/^(\-)*(\d+)\.(\d\d).*$/,'$1$2.$3');
}
2、在input的keyup事件中使用
<td >
<input type="text" name="price" value="${storeProdute.retail_price }" id="price" size="5" style="text-align: right;" οnkeyup="checkNum(this)">
</td>