IE6中javascript DOM函数的一个问题
为什么在IE6中document.examsys返回未定义的值。请尝试以下操作IE6中javascript DOM函数的一个问题,javascript,dom,internet-explorer-6,Javascript,Dom,Internet Explorer 6,为什么在IE6中document.examsys返回未定义的值。请尝试以下操作 <!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 http-equiv
<!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 http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Test</title>
</head>
<body>
<div id="test">
</div>
<script type="text/javascript">
var check = function(){
alert(document.examsys);
}
var _form = document.createElement("form");
_form.name = "examsys";
_form.action="javascript:;"
for(var i=0 ; i<5; i++){
_form.innerHTML += "<input type='radio' name='answer' value='ccc' /> abc<br />";
}
var submit = document.createElement("input");
submit.type = "image";
submit.src = "tijiao.gif";
submit.alt = "Submit";
if(submit.attachEvent){
submit.attachEvent("onclick",check);
}
else if(submit.addEventListener){
submit.addEventListener("click",check,false);
}
_form.appendChild(submit);
document.getElementById("test").appendChild(_form);
</script>
</body>
</html>
这只是一个测试用例。当单击按钮时，可以警告document.examsys的类型。结果应该是object。但在ie6中它是“undefined”。您是否尝试设置_form.id=“examsys”？
document.forms[0]