Javascript 按下按钮时发出java脚本警报
我希望在按下按钮时发生这种情况,而不是在打开/刷新站点时。有人能帮我吗?:):Javascript 按下按钮时发出java脚本警报,javascript,java,button,Javascript,Java,Button,我希望在按下按钮时发生这种情况,而不是在打开/刷新站点时。有人能帮我吗?:): 函数getRate(从,到){ var script=document.createElement('script'); script.setAttribute('src',”http://query.yahooapis.com/v1/public/yql?q=select%20rate%2Cname%20from%20csv%20where%20url%3D'http%3A%2F%2Fdownload.finan
函数getRate(从,到){
var script=document.createElement('script');
script.setAttribute('src',”http://query.yahooapis.com/v1/public/yql?q=select%20rate%2Cname%20from%20csv%20where%20url%3D'http%3A%2F%2Fdownload.finance.yahoo.com%2Fd%2Fquotes%3Fs%3D“+from+to+%253DX%26f%3Dl1n'%20和%20columns%3D'rate%2Cname'&format=json&callback=parseExchangeRate';
document.body.appendChild(脚本);
}
函数parseExchangeRate(数据){
var name=data.query.results.row.name;
var-rate=parseFloat(data.query.results.row.rate,10);
警报(“汇率”+名称+”是“+汇率”);
}
getRate(“美元”、“挪威克朗”);
您可以使用按钮的onclick属性:
单击我
并从脚本末尾删除对getRate()
的调用,以便在页面加载时不调用它
<script type="text/javascript">
function getRate(from, to) {
var script = document.createElement('script');
script.setAttribute('src', "http://query.yahooapis.com/v1/public/yql?q=select%20rate%2Cname%20from%20csv%20where%20url%3D'http%3A%2F%2Fdownload.finance.yahoo.com%2Fd%2Fquotes%3Fs%3D"+from+to+"%253DX%26f%3Dl1n'%20and%20columns%3D'rate%2Cname'&format=json&callback=parseExchangeRate");
document.body.appendChild(script);
}
function parseExchangeRate(data) {
var name = data.query.results.row.name;
var rate = parseFloat(data.query.results.row.rate, 10);
alert("Exchange rate " + name + " is " + rate);
}
getRate("USD", "NOK");
</script>