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Example 9.3:
Select One Array, See Another
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
//-->
</SCRIPT>
]]>
And this form:
<![CDATA[
<FORM>
Select the area for which you want to retrieve the area code: <select name="area" size="14">
<option >
<option selected option>Alabama 1
<option> Alabama 2
<option> Alaska
<option> Alberta
<option> Antigua
<option> Arizona 1
<option> Arizona 2
<option> Arkansas
<option> Bahamas
<option> Barbados
<option> Bermuda
<option> British Columbia 1
<option> British Columbia 2
</select><BR>
<INPUT TYPE="button" VALUE="What's the area code?" onclick="form.returninfo.value=cde[form.area.selectedIndex]"> <INPUT TYPE="TEXT" NAME="returninfo">
</FORM>
]]>
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