how to keep the selected value in the dropdownlist

2 New Member

Expand|Select|Wrap|Line Numbers

 <option value="-select">Select</option> <script type="text/javascript">

var YearList = 5; // Specify number of "year" selections.

var year = new Date().getFullYear();

var pryr1 = year-2;

var pryr = year-1;

document.write('<option value="' + pryr1 + '">' + pryr1 + '</option>'); 

document.write('<option value="' + pryr + '">' + pryr + '</option>'); 

for(var i=0;i<YearList;i++){

    var curyr = year + i;

    document.write('<option value="' + curyr + '">' + curyr + '</option>'); 

}

</script>

by having this code the result shown in the drop down list is
2013
2014
2015
2016
2017
2018
2019
if i select any year over here and update the page, the value in the drop down box comes and again to "select"
i want the year which i selected to be shown

Jan 6 '15 #1

Subscribe Reply

1538

jmrker

New Member

Don't use "document.write ()" to create your drop-down selections.
As soon as you re-enter the function, it reloads the page to it's original contents.

Modify the following to meet your needs or come back with questions.

Expand|Select|Wrap|Line Numbers

 
<!DOCTYPE html>

<html lang="en">

<head>

<meta charset="UTF-8" />

<title> Range of Years </title>
 
</head>

<body>

 From: <select id="SBox1" onchange="initBox2('SBox2',this.value)"></select>

 To: <select id="SBox2"></select>
 
<script type="text/javascript">

// From: http://www.dreamincode.net/forums/topic/341931-double-combo-box-year-range-problem/
 
function createRange(min, max) {

    var range = [];

    for (var i = min; i <= max; i++) { range.push(i); }

    return range;

}

var StartYear = [];

var EndYear = [];

var date = new Date();
 
function initBoxes(sbox,arr) {

  var Level1=document.getElementById(sbox);

  Level1.options.length = 0;

  for (i=0; i<arr.length; i++) {

    var x=document.createElement('option');

    var y=document.createTextNode(arr[i]);

    if (window.attachEvent) { x.setAttribute('value',y.nodeValue); }  // for IE

    x.appendChild(y);

    Level1.appendChild(x);

  }

}

function initBox2(sbox,newStart) {

  EndYear = createRange(newStart,date.getFullYear()+1).reverse();  // plus next year

//  EndYear = createRange(newStart,date.getFullYear()).reverse();  // to current year

  initBoxes('SBox2',EndYear);

}

window.onload = function() {

  StartYear = createRange(1925,date.getFullYear()+1).reverse();

//  StartYear = createRange(1925,date.getFullYear()).reverse();

  initBoxes('SBox1',StartYear);

}

</script>
 
</body>

</html>

Jan 6 '15 #2

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