我想利用传递参数的方式删除网页元素，代码怎样修改，错哪里？
<!!DOCTYPE html>
<html>
<head>
<title>训练</title>
<meta charset="utf-8" />
<script type="text/javascript">
function jarrem(x){
//var a=document.getElementById("bu");
var child=x.childNodes;
if(child!=null&&child.length>0){
a.removeChild(child[0]);
}
else{
alert("no child");
}
}
</script>
</head>
<body >
<div id="bu" style="border: 1px solid blue;padding: 15px ;align: center;padding: 100px;">
<input type="button" name="button" id="b1" value="1" />
<input type="button" name="button" id="b1" value="2" />
<input type="button" name="button" id="b1" value="3" />
<input type="button" name="button" id="b1" value="4" />
<input type="button" name="button" id="b1" value="5" />
<input type="button" name="button" id="b1" value="6" />
<input type="button" name="button" id="b1" value="7" />
<input type="button" name="button" id="b1" value="8" /><br>
<input type="button" onclick="jarrem(document.getElementById("bu"))"
value="del" style="width :100px; height :50px;"
align="center"/>
</div>
</body>
</html>
Jarrem2回答
-
qq_青枣工作室_0
我帮你修改了，你能看出差别吗？<!DOCTYPE html> <html> <head> <title>训练</title> <meta charset="utf-8" /> <script type="text/javascript"> function jarrem(x){ //var a=document.getElementById("bu"); var child=x.childNodes; if(child!=null&&child.length>0){ while(child[0]&& child[0].nodeType!=1) x.removeChild(child[0]); x.removeChild(child[0]); } else{ alert("no child"); } } </script> </head> <body > <div id="bu" style="border: 1px solid blue;padding: 15px ;align: center;padding: 100px;"> <input type="button" name="button" id="b1" value="1" /> <input type="button" name="button" id="b1" value="2" /> <input type="button" name="button" id="b1" value="3" /> <input type="button" name="button" id="b1" value="4" /> <input type="button" name="button" id="b1" value="5" /> <input type="button" name="button" id="b1" value="6" /> <input type="button" name="button" id="b1" value="7" /> <input type="button" name="button" id="b1" value="8" /><br> <input type="button" onclick="jarrem(document.getElementById('bu'))" value="del" style="width :100px; height :50px;" align="center"/> </div> </body> </html> -
右下角_
function jarrem(x){ //var a=document.getElementById("bu"); var child=x.childNodes; if(child!=null&&child.length>0){ //a.removeChild(child[0]);//不细心啊 x.removeChild(child[0]); } else{ alert("no child"); } }
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Html/CSS
JavaScript