Question

jquery newbie... Help with If then else statement

Asked by: jweissdandm

I am new to jquery and I have some code from a friend..

I want to add a criteria to the code below to accommodate

$(this)).attr("value")=="UnitedStates")

and

$(this)).attr("value")=="Canada")

a basic if then statement.

Thanks

An even simpler example of an 'if then' would be appreciated. 

$(document).ready(function() {
    $("#selcountry").change(function() {
        if ($("option:selected", $(this)).attr("value")=="UnitedStates") {
            $("#zipcodefield:hidden").show();
            $("#distancefield:hidden").show();
        } else {
            $("#zipcodefield:visible").hide();
            $("#distancefield:visible").hide();
            $("#zipcodefield input").val("");
            $("#distancefield option:selected").removeAttr("selected");
            $("#distancefield option[value='25']").attr("selected","selected");
        }  
		
    });
});

                                  
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Asked On
2008-05-20 at 08:29:23ID23417566
Tags

jquery

,

firefox

Topics

Asynchronous Javascript and XML (AJAX)

,

Extensible Markup Language (XML)

,

JavaScript

Participating Experts
3
Points
95
Comments
4

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Answers

 

by: b0lsc0ttPosted on 2008-05-22 at 10:37:38ID: 21625892

I don't really use jQuery but to my knowledge it doesn't have a special way to do an If.  To test for what you have above you should be able to use ...

if ($(this).attr("value")=="UnitedStates" || $(this).attr("value")=="Canada") {

}

I used an OR instead of AND (i.e. if UnitedStates OR Canada) since I didn't think you could ever have a value equal both.

Let me know if you have a question or need more info.

bol

 

by: wilq32Posted on 2008-05-23 at 00:24:41ID: 21630043

$(document).ready(function() {
    $("#selcountry").change(function() {
        if (($("option:selected", $(this)).attr("value")=="UnitedStates")||($("option:selected", $(this)).attr("value")=="Canada") {
            $("#zipcodefield:hidden").show();
            $("#distancefield:hidden").show();
        } else {
            $("#zipcodefield:visible").hide();
            $("#distancefield:visible").hide();
            $("#zipcodefield input").val("");
            $("#distancefield option:selected").removeAttr("selected");
            $("#distancefield option[value='25']").attr("selected","selected");
        }  
                
    });
});

                                              
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by: hard2u2001Posted on 2009-04-17 at 22:22:45ID: 24173929

Hi there is no any special way to do if statements in jQuery. Its done in normal JS way but for sure u can reduce above code size. Like:

$(document).ready(function() {
    $("#selcountry").change(function() {
        if (($("option:selected",$(this)).attr("value")=="UnitedStates")||($("option:selected", $(this)).attr("value")=="Canada") {
            $("#zipcodefield:hidden,#distancefield:hidden").show();
        } else {
            $("#zipcodefield:visible,#distancefield:visible").hide();
            $("#zipcodefield input").val("");
            $("#distancefield option:selected").removeAttr("selected");
            $("#distancefield option[value='25']").attr("selected","selected");
        }  
                
    });
});

                                              
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