java+空格怎么表示，我想实现一段Java字符在html中20个连续空格
<select size="1" name="DomainId" id= "DomainId" >
<option value= "">input user name first</option>
</select>
这20个连续空格代替input user name first
<select size="1" name="DomainId" id= "DomainId" >
<option value= "">input user name first</option>
</select>
这20个连续空格代替input user name first
你如果只想让select默认没有任何选中的话多写个 <option value= "" select="selected" ></option>
<html>
<head>
<title>JavaScript Loan Calculator</title> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="this is my page">
<meta http-equiv="content-type" content="text/html; charset=BIG5"> <!--<link rel="stylesheet" type="text/css" href="./styles.css">-->
</head> <body>
<script type="text/javascript">
function move(from, to)
{
var f = document.forms[0];
if(from.selectedIndex==-1) return;
for(var i=from.options.length-1;i>=0;i--){
var op = from.options[i];
if(op.selected){
to.options.add(new Option(op.text, op.value));
//alert(navigator.userAgent.toLowerCase());
//document.write(navigator.appName);
if(navigator.appName=="Microsoft Internet Explorer")
from.options.remove(i);
if(navigator.appName=="Netscape"){
//alert("john");
op.parentNode.removeChild(op);
//from.options.removeChild(i);
//alert("john");
}
}
}
}
</script>
<form>
<table>
<tr>
<td>
<select name="sel1" size="10" multiple onDblClick="move(this.form.sel1, this.form.sel2);">
<option value="A">A s</option>
<option value="B">B</option>
<option value="C">C</option>
</select>
</td>
<td>
<input type="button" value=">>" onclick="move(this.form.sel1, this.form.sel2);"><br>
<input type="button" value="<<" onclick="move(this.form.sel2, this.form.sel1);"><br>
</td>
<td>
<select name="sel2" size="10" multiple onDblClick="move(this.form.sel2, this.form.sel1);">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
</td>
</tr></table>
</form>
</body>
</html>