单选按钮在javascript函数中产生未定义的值 [英] Radio Button producing undefined value in javascript function
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问题描述
我正在尝试将单选按钮的值发送给javascript函数.最终，该函数会执行更多操作，但是我的测试已经陷入僵局，因为我不断得到未定义的返回值.这是我所拥有的:
I am trying to send the value of a radio button to a javascript function. Eventually the function will do more but my testing it has come to a dead end because I keep getting a returned value of undefined. Here is what I have:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta content="text/html; charset=utf-8" http-equiv="Content-Type" />
<title>Untitled 1</title>
<SCRIPT TYPE="text/javascript">
<!--
function jobWindow(){
var target;
for( i = 0; i < document.jobView.sales.length; i++ ){
if( document.jobView.sales[i].checked == true )
target = document.jobView.sales[i].value;
break;
}
alert( "val = " + target );
//var load = window.open('target','','scrollbars=no,menubar=no,height=600,width=800,resizable=yes,toolbar=no,location=no,status=no');
}
// -->
</script>
</head>
<body>
<form name="jobView">
<input name ="sales" value="all" type="radio" />All
<input name="sales" value="darell" type="radio" />Darell
<input name="sales" value="kevin" type="radio" />Kevin
<input name="sales" value="brad" type="radio" />Brad
<input name="sales" value="chongo" type="radio" />Chongo
<input type="button" value="View Records" onclick="jobWindow()"/>
<input type="button" value="View Calendar" />
</form>
</body>
</html>
推荐答案
尝试使用 document.getElementsByTagName ，如下所示:
function jobWindow(){
var myvalue;
var el = document.getElementsByTagName('input');
for( i = 0; i < el.length; i++ ){
if (document.forms['jobView'].el[i].type === 'radio' && document.forms['jobView'].el[i].name === 'sales')
{
if(document.forms['jobView'].el[i].checked == true )
{
myvalue = document.forms['jobView'].el[i].value;
break;
}
}
}
alert( "val = " + myvalue );
}
还请注意，您的 break 行从未执行过，因为您缺少大括号:
Note also that your break line never executed because you were missing curly brackets:
if( document.jobView.sales[i].checked == true )
{
target = document.jobView.sales[i].value;
break;
}
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