Question

在js中为什么我在文本框里面写onBlur事件时页面报对象不支持此属性或方法

<td colspan="2" >送宽带个数:</td>
<td>
<input type="text" name="broadbandNum" onBlur="javascript:broadbandCost();" value="${requestScope.dlp.broadbandNum}" size="16" >
</td>
<td>宽带折成本:</td>
<td>
<input type="text" name="broadbandCost" value="${requestScope.dlp.broadbandCost}" size="16">
</td>
function broadbandCost(){
var broadbandNum=document.form1.getElementByName("broadbandNum").value;
var broadbandCost=document.form1.getElementByName("broadbandCost").value;
alert("错误");
if(broadbandNum.value.length>0){
broadbandCost=broadbandNum*1000;
}
}

Answer 1

把onBlur="javascript:broadbandCost();"
换成onBlur="jbroadbandcost();"
同时改下函数名就可以了

Answer 2

var broadbandNum=document.form1.getElementByName("broadbandNum").value;
broadbandNum 它已经是一个值了，if(broadbandNum.value.length>0) 你在在这里取value能不错嘛，改成 if(broadbandNum.length>0) 就可以了