How can I use html tag in this javascript?

Question

First of all, why <br> doesn't work in prompt. Secondly, why can't I use tags for this code (poundOne.pound) to make the font larger by using css or html code such as <h1>, <h2>, <h3>... or <div style="......">?

<html>
<head>
<script type="text/javascript">


function poundToKgConvertor( pound ){
    this.pound = pound;
    this.convertorDon = convertor;
}
function convertor(){
    var convert = this.pound * 0.453592;
    return convert;
}

var poundOne = new poundToKgConvertor(prompt ("Convert Pound to Kilogram!<br> Please insert your    number of pound!"));
</script>

</head>

<body>

<script type="text/javascript">


document.write(poundOne.pound +  " Pound = " + poundOne.convertorDon() + " <b>Kilogram</b>");

</script>

</body>
</html>

Which JS isn't working — `var poundOne` or the `document.write`? — FeifanZ, Oct 05 '14 at 16:26

score 2 · Accepted Answer · answered Oct 05 '14 at 16:27

2

You can't use HTML in prompt/alert dialogs. However you can use new line characters:

prompt ("Convert Pound to Kilogram!\n Please insert your number of pound!");

answered Oct 05 '14 at 16:27

dfsq

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Thank you! but anyone knows about my second question? – Tohid Oct 05 '14 at 18:21
Sorry, what is the seconds question? Why you can't use HTML there? The answer: because prompt/alert is not a part of HTML structure, it's not DOM. – dfsq Oct 05 '14 at 18:23
yes i know is not part of HTML. Second question: why can't I use tags for this code (poundOne.pound) to make the font larger by using css or html code such as
,
,
... or
?
– Tohid Oct 05 '14 at 18:28
not sure I get it: http://plnkr.co/edit/usI0GEAs0uK4Hzz6oYhv?p=preview – dfsq Oct 05 '14 at 18:46

How can I use html tag in this javascript?

1 Answers1

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,

... or ?

... or
?