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我有一個腳本需要捕獲一個值（textbox1），並使用該值來確定數組的大小。然後，我需要使用不同的文本框（tesxtbox2）來捕獲值來填充數組，然後處理一些計算。JavaScript：使用一個文本框作爲循環的基礎來捕獲第二個文本框中的值？
我可以捕獲第一值細，尺寸的陣列，且填充陣列，如果我使用的數據採集窗口提示。我無法弄清楚如何用文本框捕獲來替換提示方法。
這裏是代碼和註釋顯示我在哪裏卡住了。實質上，我需要用「通過id獲取元素」替換「window.prompt」部分並使用文本框，循環遍歷值直到輸入的初始數字（文本框1）被滿足。
<html>
<head>
<meta charset = "utf-8">
<title>Variance and Standard Deviation</title>
<style type = "text/css">
#placement {
width: 50%;
padding: 0 0px;
align:right;
text-align: left;
}
#sorted {
width: 50%;
padding: 0 0px;
float:left;
text-align: left;
}
#mean,{
width: 50%;
padding: 0 0px;
align:right;
text-align: left;
}
#variance,{
width: 50%;
padding: 0 0px;
align:right;
text-align: left;
}
#deviation,{
width: 50%;
padding: 0 0px;
position: relative;
text-align: left;
}
</style>
<script>
//declare and intialize variables
var capCount = 0; //capture count of variables to be entered
var count = 0; //parse captured count to an integer
var arrayTotal=0 ; //total of all values entered into array for math calcs
var arrayAverage=0; //average (mean) of values in array
var sortedArray = 0; //array sorted in ascending order
var values = 0; //values entered into text box for array population
function start(formInfo)
{
var countField = document.getElementById("count"); // gets entry from count field on form
var capCount = countField.value;
var count = parseInt (capCount);
var valueArray = new Array(); // allocate empty array
//start capture and populate array loop
for (var i = 0; i < count; ++i) //using loops count, prompts user to enter variables until count of loops (count) is reached
//STUCK HERE- replace variable capture from window prompt to get value from text box
// rather than using window prompt box, need to capture input from the "value" text box,
// loop through the text box each time a value is entered and process when the last value (loops equal to count) is entered
{
var variable = window.prompt("Please enter a value for value " + (i + 1) + ""); //prompts user to enter a value
//var variable = document.getElementById("value");
valueArray [ i ] = variable ;
} //end capture for loop
//calls sort function to sort array into ascending order
valueArray.sort (sort);
//calls calcuate function to conduct math and get results
calculate (valueArray);
}// end build array function
//sort function
function sort (value1, value2)
{
return parseInt (value1) - parseInt(value2);
} //end sort
//calcuate function
function calculate (theArray)
{
//declare variables
n = 0;
arrayTotal = 0;
total_sqr = 0;
for (var i = 0; i < theArray.length; ++i)
{
arrayTotal += +theArray[i];
n = (n + 1);
total_sqr += (+theArray[i] * +theArray[i]);
}
//mean, variance, deviation calcs
mean = (arrayTotal/theArray.length); //calcuate mean
variance = (total_sqr - ((arrayTotal*arrayTotal)/n))/(n - 1);
deviation = Math.sqrt(variance) ;
//calls output function to output the resuls of the script
output("The sorted order of the values entered is", theArray, document.getElementById("sorted"));
output("The mean of the values entered is", mean.toFixed(2), document.getElementById("mean"));
output("The variance of the values entered is", variance.toFixed(2), document.getElementById("variance"));
output("The standard deviation of the values entered is", deviation.toFixed(2), document.getElementById("deviation"));
} //end calculations
//output function
function output (heading, data, results)
{
var content = "<p>" + heading + "</p><p>" + data + "</p>" ;
results.innerHTML = content; // place the table in the output element
} //end output
</script>
</head>
<body>
<body>
<P><h2>This Page calcuates mean, variance and standard deviation</h2></p>
<form action = "#">
<p><label><h3>Enter the # of values to process and click submit:</h3>
<input id = "count" type = "number" size = "10"></label>
<div>
<input type="button" value="Submit #of values to " onClick="start(this.form);">
</div>
<p><label><h3>Enter the x value to process:</h3>
<input id = "value" type = "number" size = "10"></label>
<p>
<input type="button" value="process your values" onClick="process(this.form);">
</p>
</form>
<div id = "sorted"></div>
<div id = "placement">
<div id = "mean"></div>
<div id = "variance"></div>
<div id = "deviation"></div>
</div>
</body>
</html>