Previous Example-|-Next Example-|-Return to Chapter Listing
Example 9.2:
Creating and Checking an Array II
Select the array and position and then click on the button to see what is held in that position:
This is the script we used in the HEAD:
<![CDATA[
<SCRIPT LANGUAGE="JAVASCRIPT">
<!--
// generic object maker prepares an empty array of n items
function makeArray(n) {
this.length = n
for (var i=1; i <= n; i++){
this[i] = null;
}
return this
}
// create object listing all the top end of each numeric range
var cde = new makeArray(187)
var area = new makeArray(187)
area[1] = "Alabama "; cde[1] = 205
area[2] = "Alabama "; cde[2] = 334
area[3] = "Alaska "; cde[3] = 907
area[4] = "Alberta "; cde[4] = 403
area[5] = "Antigua "; cde[5] = 268
area[6] = "Arizona "; cde[6] = 520
area[7] = "Arizona "; cde[7] = 602
area[8] = "Arkansas "; cde[8] = 501
area[9] = "Bahamas "; cde[9] = 242
area[10] = "Barbados "; cde[10] = 246
area[11] = "Bermuda "; cde[11] = 441
area[12] = "British Columbia "; cde[12] = 250
area[13] = "British Columbia "; cde[13] = 604
function GetArray(form) {
var nBase
if (form.array.selectedIndex == 0) sArray = area;
if (form.array.selectedIndex == 1) sArray = cde;
form.returninfo.value = sArray[form.arraypos.selectedIndex]
}
//-->
</SCRIPT>
]]>
And this form:
<![CDATA[
<FORM>
Select array you want to check: <select name="array" size="2">
<option selected value>area
<option>cde
</select><P>
Select an array position you want to check: <select name="arraypos" size="2">
<option>
<option selected value>1
<option>2
<option>3
<option>4
<option>5
<option>6
<option>7
<option>8
<option>9
<option>10
<option>11
<option>12
<option>13
<option>14
</select><P>
<INPUT TYPE="button" VALUE="What's in this position?" onclick="GetArray(this.form)"><P>
Here's the information in that position: <INPUT TYPE="TEXT" NAME="returninfo">
</FORM>
]]>
Previous Example-|-Next Example-|-Return to Chapter Listing