Added javascript to change pull-down list based on value in a differe…

…nt pull-down list

HTML/Interdependent Select List.html

@@ -0,0 +1,40 @@
+
+<!-- 
+Creating a 2 level interdependent select list:
+
+http://www.javascriptkit.com/javatutors/selectcontent2.shtml 
+
+-->
+
+<form name="classic">
+<select name="countries" size="4" onChange="updatecities(this.selectedIndex)" style="width: 150px">
+<option selected>Select A City</option>
+<option value="usa">USA</option>
+<option value="canada">Canada</option>
+<option value="uk">United Kingdom</option>
+</select>
+
+<select name="cities" size="4" style="width: 150px" onClick="alert(this.options[this.options.selectedIndex].value)">
+</select>
+</form>
+
+<script type="text/javascript">
+
+var countrieslist=document.classic.countries
+var citieslist=document.classic.cities
+
+var cities=new Array()
+cities[0]=""
+cities[1]=["New York|newyorkvalue", "Los Angeles|loangelesvalue", "Chicago|chicagovalue", "Houston|houstonvalue", "Austin|austinvalue"]
+cities[2]=["Vancouver|vancouvervalue", "Tonronto|torontovalue", "Montreal|montrealvalue", "Calgary|calgaryvalue"]
+cities[3]=["London|londonvalue", "Glasgow|glasgowsvalue", "Manchester|manchestervalue", "Edinburgh|edinburghvalue", "Birmingham|birminghamvalue"]
+
+function updatecities(selectedcitygroup){
+citieslist.options.length=0
+if (selectedcitygroup>0){
+for (i=0; i<cities[selectedcitygroup].length; i++)
+citieslist.options[citieslist.options.length]=new Option(cities[selectedcitygroup][i].split("|")[0], cities[selectedcitygroup][i].split("|")[1])
+}
+}
+
+</script>