为什么同样的代码放到本机就不起作用？
anna117
2015-07-13 13:47
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>无标题文档</title>
</head>
<body>
<form>
请选择你爱好:<br>
<input type="checkbox" name="hobby" id="hobby1"> 音乐
<input type="checkbox" name="hobby" id="hobby2"> 登山
<input type="checkbox" name="hobby" id="hobby3"> 游泳
<input type="checkbox" name="hobby" id="hobby4"> 阅读
<input type="checkbox" name="hobby" id="hobby5"> 打球
<input type="checkbox" name="hobby" id="hobby6"> 跑步 <br>
<input type="button" value = "全选" onclick = "checkall();">
<input type="button" value = "全不选" onclick = "clearall();">
<p>请输入您要选择爱好的序号，序号为1-6:</p>
<input id="wb" name="wb" type="text" >
<input name="ok" type="button" value="确定" onclick = "checkone();">
</form>
<script type="text/javascript">
function checkall(){
var text=document.getElementsByTagName("input");
for(var i=0;i<text.length;i++){
if(text[i].type="checkbox") {
text[i].checked="checked";}
}
// 任务1
}
function clearall(){
var mychar=document.getElementsByTagName("input");
for(var j=0;j<mychar.length;j++){
if(mychar[j].type="checkbox"){
mychar[j].checked="";
}
}
}
// 任务2
}
function checkone(){
var hhy=document.getElementById("wb").value;
var abc=document.getElementsByName("hobby");
if(hhy>0&hhy<7){
abc[hhy].checked="checked";
}
}
// 任务3
}
</script>
</body>
</html>
2回答
-
- cai鸟
- 2015-07-13 18:05:42
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>无标题文档</title>
</head>
<body>
<form>
请选择你爱好:<br>
<input type="checkbox" name="hobby" id="hobby1"> 音乐
<input type="checkbox" name="hobby" id="hobby2"> 登山
<input type="checkbox" name="hobby" id="hobby3"> 游泳
<input type="checkbox" name="hobby" id="hobby4"> 阅读
<input type="checkbox" name="hobby" id="hobby5"> 打球
<input type="checkbox" name="hobby" id="hobby6"> 跑步 <br>
<input type="button" value = "全选" onclick = "checkall();">
<input type="button" value = "全不选" onclick = "clearall();">
<p>请输入您要选择爱好的序号，序号为1-6:</p>
<input id="wb" name="wb" type="text" >
<input name="ok" type="button" value="确定" onclick = "checkone();">
</form>
<script type="text/javascript">
function checkall(){
var hobby = document.getElementsByTagName("input");
for(var i=0; i<hobby.length; i++){
hobby[i].checked = true;
}
// 任务1
}
function clearall(){
var hobby = document.getElementsByName("hobby");
for(var i=0; i<hobby.length; i++){
hobby[i].checked = false;
}
// 任务2
}
function checkone(){
var j=document.getElementById("wb").value;
var h=document.getElementById('hobby'+j)
h.checked=true;
// 任务3
}
</script>
</body>
</html> -
- 无月
- 2015-07-13 14:18:30
这里不对，应该是 if(text[i].type=="checkbox") 双等号判断，单等号是赋值
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