Popup-caixas do Javascript

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Popup-caixas do Javascript

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No Javascript voc� pode criar tr�s tipos de caixas do popup: A caixa alerta, confirma a caixa, e a caixa alerta.

Caixa alerta

Uma caixa alerta � usada se voc� quiser se certificar que a informa��o vem atrav�s do usu�rio.

Quando uma caixa alerta estala acima, o usu�rio ter� que estalar �APROVADO� proseguir.

Sintaxe:

alert("sometext")

Exemplo: 1

<html>
<head>
<script type="text/javascript">
function disp_alert()
{
alert("I am an alert box!!")
}
</script>
</head>

<body>
<form>
<input type="button" onclick="disp_alert()" value="Display alert box">
</form>
</body>
</html>

Confirmar a caixa

A caixa da confirma��o � usada se voc� quiser o usu�rio verificar ou aceitar algo.

Quando uma caixa da confirma��o estala acima, � dependente do usu�rio que estalar� �APROVADO� ou o �cancelamento� a proseguir.

Se o usu�rio estalar �APROVADO�, a caixa retorna verdadeiro. Se os cliques �cancelamento� do usu�rio, a caixa retornarem falso.

Sintaxe

prompt("sometext","defaultvalue")

Exemplo: 2

<html>
<head>
<script type="text/javascript">
function disp_prompt()
{
var name=prompt("Please enter your name","")
if (name!=null && name!="")
{
document.write("Hello " + name + "! How are you today?")
}
}
</script>
</head>

<body>
<form>
<input type="button" onclick="disp_prompt()" value="Display a prompt
box">
</form>
</body>
</html>

Caixa alerta

Uma caixa alerta � usada se n�s quisermos o usu�rio input um valor antes de entrar em uma p�gina.

Quando uma caixa alerta estala acima, o usu�rio ter� que estalar �APROVADO� ou o �cancelamento� a proseguir ap�s ter incorporado um valor da entrada.

Se o usu�rio estalar a tecla �APROVADA� a caixa retorna o valor da entrada. Se a tecla do �cancelamento� dos cliques do usu�rio a caixa retornar o zero.

Sintaxe:

prompt("sometext","defaultvalue")

Exemplo: 3

<html>
<head>
<script type="text/javascript">
function disp_prompt()
{
var name=prompt("Please enter your name","")
if (name!=null && name!="")
{
document.write("Hello " + name + "! How are you today?")
}
}

</script>
</head>

<body>
<form>
<input type="button" onclick="disp_prompt()" value="Display a prompt box">
</form>
</body>
</html>

Sa�da

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Keywords:JavaScript Popup Boxes

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