如何从JavaScript函数接收多个值？
[英]How to receive multiple values from a javascript function?
问题描述
A javascript function is being called at the time of page loading which is returning multiple values and i need to receive those values. 
页面加载时正在调用javascript函数，该函数返回多个值，我需要接收这些值。 What should i specify in form or body tag so as to make use of those values in my jsp page? 我应该在form或body标签中指定什么，以便在jsp页面中使用这些值？
The code i am using is: 我使用的代码是：
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
<script type="text/javascript">
function Browser()
{
var myWidth;
var myHeight;
if( typeof( window.innerWidth ) == 'number' ) {
//Non-IE
myWidth = window.innerWidth;
myHeight = window.innerHeight;
} else if( document.documentElement &&
( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
//IE 6+ in 'standards compliant mode'
myWidth = document.documentElement.clientWidth;
myHeight = document.documentElement.clientHeight;
} else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
//IE 4 compatible
myWidth = document.body.clientWidth;
myHeight = document.body.clientHeight;
}
return {myWidth:myWidth, myHeight:myHeight};
}
</script>
</head>
<body onload="Browser()">
<form name="hello" action="" method="post" >
<table align="center" border="1">
<tr>
<td>
User Name:
</td>
<td>
<input type="text" name="user"/>
</td>
</tr>
<tr>
<td>
Password:
</td>
<td>
<input type="password" name="pwd"/>
</td>
</tr>
<tr align="center">
<td colspan="2">
<input type="submit" value="Submit"/>
</td>
</tr>
</table>
</form>
</body>
</html>
In the above code function Browser is returning the resolution values and i had called that function using onload() method. 在上面的代码函数中，浏览器返回了分辨率值，我已经使用onload（）方法调用了该函数。 How should i receive those values of myWidth and myHeight so as to use them in the same jsp page? 我应该如何接收这些myWidth和myHeight值，以便在同一jsp页面中使用它们？
4 个解决方案
解决方案1
1 已采纳 2012-01-16 13:42:51
you can return a object containing all the relevant values: 您可以返回包含所有相关值的对象：
function myFunction() {
return { val1: 1, val2: 2, val3: 3 };
}
usage: 用法：
var tmp = myFunction();
var val1 = tmp.val1;
var val2 = tmp.val2;
//...
解决方案2
0 2012-01-16 13:42:29
Your commented out return statement is fine: 您注释掉的退货声明很好：
return {myWidth:myWidth, myHeight:myHeight};
It can then be used in other javascript like so: 然后可以在其他javascript中使用它，如下所示：
var dimension = Browser();
var width = browser.myWidth;
var height = browser.myHeight;
You will not have access to these variables on the server (unless you post them) since javascript executes on the client. 由于将在客户端执行javascript，因此您将无法访问服务器上的这些变量（除非您将其发布）。
解决方案3
0 2012-01-16 13:42:50
返回JSON对象或结果数组。
解决方案4
0 2012-01-16 13:49:06
You can pass all your variables together, using some JSON notation to pass the data 您可以将所有变量一起传递，使用一些JSON表示法传递数据
document.write('{myWidth:'+myWidth+',myHeight:'+myHeight+'}');
Once you have the data, decode the JSON and use your variables. 获得数据后，解码JSON并使用变量。
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