每次按下提交时,我都创建了一个简单的页面来更改div id.我的问题是,这从div_top1 - > div_top2更改,但第二次按下按钮,它停止更改:(
<!DOCTYPE html>
<html>
<head>
<script>
function changediv()
{
document.getElementById("div_top1").innerHTML=Date();
document.getElementById("div_top1").setAttribute("id", "div_top2");
document.getElementById("div_top2").innerHTML="teste";
document.getElementById("div_top2").setAttribute("id", "div_top1");
}
</script>
<style>
.top {
background-color: navy;
color: white;
padding: 10px 10px 10px 10px;
margin: 5px 5px 5px 5px;
}
.down {
background-color: aqua;
padding: 10px 10px 10px 10px;
margin: 5px 5px 5px 5px;
}
</style>
</head>
<body>
<div id="div_top1" class="top">This is a paragraph.</div>
<div class="down"><button type="button" onclick="changediv()">Display Date</button></div>
</body>
</html>
Hy,我有这个代码例如:
function generateRandStr($length){
$randstr = "";
for($i=0; $i<$length; $i++){
$randnum = mt_rand(0,61);
if($randnum < 10){
$randstr .= chr($randnum+48);
}else if($randnum < 36){
$randstr .= chr($randnum+55);
}else{
$randstr .= chr($randnum+61);
}
}
return $randstr;
}
但当它试图在主要使用时:
generateRandStr(10);
echo $irandstr;
我不做什么？:(