Mega Code Archive
A Looping Array Lookup
<![CDATA[
/*
JavaScript Bible, Fourth Edition
by Danny Goodman
John Wiley & Sons CopyRight 2001
*/
<HTML>
<HEAD>
<TITLE>Parallel Array Lookup II</TITLE>
<SCRIPT LANGUAGE="JavaScript">
// the data
var regionalOffices = new Array("New York", "Chicago", "Houston", "Portland")
var regionalManagers = new Array("Shirley Smith", "Todd Gaston", "Leslie Jones", "Harold Zoot")
var regOfficeQuotas = new Array(300000, 250000, 350000, 225000)
// do the lookup into parallel arrays
function getData(form) {
// make a copy of the text box contents
var inputText = form.officeInp.value
// loop through all entries of regionalOffices array
for (var i = 0; i < regionalOffices.length; i++) {
// compare uppercase versions of entered text against one entry
// of regionalOffices
if (inputText.toUpperCase() == regionalOffices[i].toUpperCase()) {
// if they're the same, then break out of the for loop
break
}
}
// make sure the i counter hasn't exceeded the max index value
if (i < regionalOffices.length) {
// display corresponding entries from parallel arrays
form.manager.value = regionalManagers[i]
form.quota.value = regOfficeQuotas[i]
} else { // loop went all the way with no matches
// empty any previous values
form.manager.value = ""
form.quota.value = ""
// advise user
alert("No match found for " + inputText + ".")
}
}
</SCRIPT>
</HEAD>
<BODY>
<H1>Parallel Array Lookup II</H1>
<HR>
<FORM NAME="officeData">
<P>
Enter a regional office:
<INPUT TYPE="text" NAME="officeInp" SIZE=35>
<INPUT TYPE="button" VALUE="Search" onClick="getData(this.form)">
</P><P>
The manager is:
<INPUT TYPE="text" NAME="manager" SIZE=35>
<BR>
The office quota is:
<INPUT TYPE="text" NAME="quota" SIZE=8>
</P>
</FORM>
</BODY>
</HTML>
]]>