Why these javascript function won't start?
Question
I don't know why these JavaScript functions won't start. I've got a very tiny knowledge of JavaScript so I'm asking if I made some big mistakes.
Here is my code:
<!DOCTYPE html>
<html>
<head>
<title>prova</title>
<script>
var ind = 0;
var mat = new Array(10);
for(int i=0;i<10;i++)
mat[i] = new Array(2);
function addValue()
{
mat[ind]["nome"] = document.modulo.nome.value;
mat[ind]["cognome"] = document.modulo.cognome.value;
ind++;
alert("Valore aggiunto con successo!");
}
function showValues()
{
var pag = window.open("","page","width=250,height=200");
pag.document.write("<table>");
for(int i=0;i<10;i++)
{
pag.document.write("<tr>");
pag.document.write("<td>" + mat[i]["nome"] + "</td>");
pag.document.write("<td>" + mat[i]["cognome"] + "</td>");
pag.document.write("</tr>");
}
pag.document.write("</table>");
}
</script>
</head>
<body>
<h1>Matrice associativa</h1>
<form name="modulo" method="post">
<b>Nome: </b><input type="text" name="nome"/><br/><br/>
<b>Cognome: </b><input type="text" name="cognome"/><br/><br/>
<input type="button" name="aggiungi" value="Aggiungi" onclick="addValue();"/>
<input type="button" name="visualizza" value="Visualizza" onclick="showValues();"/>
</form>
</body>
</html>
3 answers
solution1
3 2017-12-03 07:44:27
You should check the console.
The problem in this case is that you wrote for (int i=0 ... and let should have been used instead of int . The error is present twice in your code.
With that fixed it works as expected.
solution2
1 2017-12-03 07:46:15
检查您是否为循环编写了int我这是错误的，因为您必须使用javascript变量声明是javascript变量。
solution3
0 2017-12-03 07:58:59
The error is with the for loops, you don't need to use data types here.
Replace the codes.
for (i = 0; i < 10; i++)
mat[i] = new Array(2);
and
for (i = 0; i < 10; i++)
{
pag.document.write("<tr>");
pag.document.write("<td>" + mat[i]["nome"] + "</td>");
pag.document.write("<td>" + mat[i]["cognome"] + "</td>");
pag.document.write("</tr>");
}
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