Question

populate drop down list on page load with jQuery

Asked by: dlcnet


 Hi Experts!

 I have a jQuery problem. I would like basically to populate two drop-downs. First one has 5 values. The seccond list gets the values based on the first selection. The example: say we choose 5 from the first drop-down. The second drop-down is formed from numbers numbers from 25-65. For 4 the list in the 2nd drop-down changes from 20-100

Thank you!

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Asked On
2009-10-29 at 13:51:58ID24856259
Tags

jQuery

Topic

Jquery

Participating Experts
1
Points
500
Comments
2

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Answers

 

by: dlcnetPosted on 2009-10-29 at 15:20:26ID: 25698833


 forget about the first Question :) I found a solution myself. However I would like to make this as a function that I can send the parameters myself since there are 5 of this 2 drop down boxes on the page.

 Any idea how I can do this?

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
	<head>
		<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
		<title>Untitled Document</title>
		<script type="text/javascript" src="lib/jquery/jquery-1.3.2.min.js"></script>
	</head>
	
	<script type="text/javascript">
 
		jQuery( function() {
			
			var optionsArray = ['---', 'A', 'B', 'C', 'D', 'E', 'F'];
			
			jQuery.each(optionsArray, function(index, value) {
				jQuery('#option1List').append('<option value="' + value + '">' + value + '</option>');
			}) 
			
			
			var getSelectedListElement = jQuery('#option1List').val();
			// alert(getSelectedListElement);
			if (getSelectedListElement == "---"){
				var option2list = jQuery('#option2List');
				option2list.empty();
				var option2Items = '';
				for (i=0; i<25; i++) {
					option2Items +='<option value="' + i + '">' + i + '</option>' 
					}
				option2list.html(option2Items);
				option2list.children(":first").text("---");				
			}	
					
			jQuery('#option1List').change( function() {
				var optionSelected = jQuery(this).val();
				switch (optionSelected) {
					case '---':
					var option2list = jQuery('#option2List');
						option2list.empty();
						var option2Items = '';
						for (i=0; i<25; i++) {
							option2Items +='<option value="' + i + '">' + i + '</option>' 
						}
						option2list.html(option2Items);
						option2list.children(":first").text("---");
					break;
					
					case 'A':
						var option2list = jQuery('#option2List');
						var defaultValue = 12;
						var option2Items = '';
						for (i=0; i<25; i++) {
								option2Items +='<option value="' + i + '">' + i + '</option>'; 
							}
						option2list.html(option2Items);
						option2list.val(defaultValue);
					break;
					
					case 'B':
						var option2list = jQuery('#option2List');
						option2list.empty();						
						var defaultValue = 22;
						var option2Items = '';
						for (i=20; i<45; i++) {
								option2Items +='<option value="' + i + '">' + i + '</option>'; 
							}
						option2list.html(option2Items);
						option2list.val(defaultValue);
					break;
 
				}
					
				//alert(optionSelected);
			});
			
		})
		
		
		
	</script>
	
	<body>
		
		<select id="option1List">
					
		</select>
		
		
		<select id="option2List">			
			
		</select>
		
	</body>
</html>
                                              
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by: amit_gPosted on 2009-11-04 at 15:10:43ID: 25745123

Like this...

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
        <head>
                <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
                <title>Untitled Document</title>
				<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3/jquery.min.js"></script>
        </head> 
        <script type="text/javascript"> 
                jQuery( function() {
						SetOption1Option2(jQuery('#option1List'), jQuery('#option2List'));
						SetOption1Option2(jQuery('#option3List'), jQuery('#option4List')); 
                }) 
				function SetOption1Option2(option1, option2)
				{
                        var optionsArray = ['---', 'A', 'B', 'C', 'D', 'E', 'F']; 
                        jQuery.each(optionsArray, function(index, value) {
                                option1.append('<option value="' + value + '">' + value + '</option>');
                        }) 
						PopulateOption2(option1, option2) 
                        option1.change( function() {
                        		PopulateOption2(jQuery(this), option2) 
                        });
				} 
				function PopulateOption2(option1, option2)
				{
					var optionSelected = option1.val();
					switch (optionSelected) {
							case '---':
									RePopulateOption2(option2, 0, 25, true, "---");
							break; 
							case 'A':
									RePopulateOption2(option2, 0, 25, false, 12);
							break; 
							case 'B':
									RePopulateOption2(option2, 20, 45, false, 22);
							break; 
					}
				} 
				function RePopulateOption2(option2, minVal, maxVal, showDash, defaultValue)
				{
					option2.empty(); 
					var option2Items = ''; 
					for (i=minVal; i<maxVal; i++) {
							option2Items +='<option value="' + i + '">' + i + '</option>'
					} 
					option2.html(option2Items); 
					if (showDash)
					{
						option2.children(":first").text("---");
					} 
					option2.val(defaultValue);
				}
        </script> 
        <body> 
                <select id="option1List"></select>
                <select id="option2List"></select> 
                <select id="option3List"></select>
                <select id="option4List"></select> 
        </body>
</html>

                                              
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