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我已经在javascript中创建了一个表。它基于用户输入,并将检查以确保输入的值是一个数字。但我怎么也让它检查,以确保输入的值是 高于0 和小于10写javascript以动态创建表。需要帮助验证用户输入
<html>
<head>
<title>Homework 1</title>
<script language="javascript" type="text/javascript">
function doWork(){
var rows = document.getElementById("input1").value;
var columns = document.getElementById("input2").value;
//alert(rows);
//alert(columns);
if(isNaN(rows) == true || isNaN(columns) == true){
document.getElementById('tablePlacement').innerHTML = "Input must be integer";
}
else{
var htmlInput = "";
htmlInput += "<table border='1'>";
htmlInput += "<tr>";
//Column Headers
for (i = 0; i <= columns; i++){
htmlInput += ("<td><b>" + i + "</b></td>");
}
htmlInput += "</tr>";
for (i = 1; i <= rows; i++){
htmlInput += ("</br><tr><td><b>" + i + "</b></td>");
for (j = 1; j<= columns; j++){
var multiplyResult = i * j;
htmlInput += ("<td>" + multiplyResult + "</td>");
}
htmlInput += "</tr>";
}
htmlInput += "</table>";
document.getElementById('tablePlacement').innerHTML = htmlInput;
}
};
</script>
</head>
<body>
<form id="input1Form">
Rows: <input type="text" id="input1">
</form>
<form id="input2Form">
Columns: <input type="text" id="input2">
</form>
<button type="button" onclick="doWork()">Enter</button>
<div id="tablePlacement">
</div>
</body>
我知道如何编写代码。我更疑惑在哪里实际放置它。这是嵌套的if语句吗?它将如何工作? – onTheInternet 2013-02-14 01:09:31
如果语句像这样:if(rows不是一个数字,或者行<= 0,或者rows> = 10,或者cols不是一个数字,或者cols是<= 0,或者cols是> = 10){渲染一般的错误信息,如“行和列必须是小于10的正数”} else {... render table ...} – codefactor 2013-02-14 01:13:29