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Javascript if on hiiden value

I want to run part of a javascript script only if my hidden field's value is set to On.

I am getting an error from Visual Studio because the script is continuing whether the value is On or anything else.

Can you help me?
if (document.getElementById('<%=BlanketHdn.ClientID%>').value = 'On')
                        var wrapElement = document.getElementById('Blanket');
                        wrapElement.style.position = 'absolute';
                        wrapElement.style.left = '0px';
                        wrapElement.style.width = (windowWidth) + 'px';
                        wrapElement.style.top = '0px';
                        wrapElement.style.height = (windowHeight) + 'px';

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1 Solution
You need a double equals sign for a comparative operation. Right now you are actually doing an assignment and it will always evaluate to true. Try this:
if (document.getElementById('<%=BlanketHdn.ClientID%>').value == 'On')
CatsSolutionsAuthor Commented:
I can not believe that I missed that! I feel very stupid now.

Thank you.
Glad to help. And don't feel stupid - It's so easy to miss a typo in your own stuff and then keep reading how your brain knows it should be, rather than how it really is :) I think we all do that!

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