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Dynamic Dropdown Menu if-else does not become dynamic

I have two dropdown menus, im having trouble with making the options for the second dropwdown to be dependent on the choice on the first dropdown menu. $city=""; $formcontent =<<<EOT <label>Assumed Bitten City : </label> <select name="AssumedBittenCity" id="AssumedBittenCity"> <option value="0">Make a Selection</option> <option value="Caloocan City">Caloocan City</option> <option value="Las Pi&#241;as City">Las Pi&#241;as City</option> <option value="Makati City">Makati City</option> <option value="Malabon City">Malabon City</option> <option value="Mandaluyong City">Mandaulyong City</option>

hiding and showing radio button and dropdown based on values

<select name="drop1" id='drop1'> <option value="" selected="selected"></option> <option value="data1">Data1</option> <option value="data2L">Data2</option> <select name="drop2" id='drop2'> <option value="" selected="selected"></option> <option value="data3">Data3</option> <option value="data4">Data4</option> When I select data1 and data3 from the two drop downs i need to display another dropdown below: <div id="show_drop"> <select name="drop3" id='drop3'> <option value="" selected="selected"></option> <option value="data5">Data5</option> </div> else display radio button: <div id="rbutton"> <input type="radio" nam

How to retain a selected value in dynamically generated dropdown box to the next jsp page?

I have a drop down box where the options are coming from the configured properties file.The options are generated on load of the page.I have used the following code. In JSP <select name="IDNo" id="IDNo"> </select> function loading() { var d = document.getElementById("system"); var df=document.getElementById("IDNo"); var i = 0; var disp = document.getElementById("Range"); var numberOfOptions = df.options.length; for (i = 0; i < numberOfOptions; i++) { df.remove(0); } if (d.value == "Apple") { df.options[df.options.length] = new Option("ALL",""); for(i=1;i<=disp.value;i++) { var option = document.createElement("option"); option.text=i; option.value=