javascript - Setting a minimum height of a container on page load prototype -


ok, trying set minimum height of container dynamically on page load using prototype page displays correctly. header , footer equal 345px in height, trying set main-container div's minimum height window's inner height minus these dimensions when page loads, pages no content in these fivs appear correctly. here have tried far:

document.observe("dom:loaded", function() {     var minheight = window.innerheight;     minheight -= 345;     $('main-container').style.minheight = minheight; });

and:

document.observe("dom:loaded", function() {     var minheight = window.innerheight;     minheight -= 345;     $('main-container').setstyle({         minheight : minheight     }); });

i know script fires on page load via alert in document.observe function, isn't adding height or throwing errors. ideas?

edit

thanks @andrew answering, have added code when user resizes , thought i'd share:

event.observe(window, 'resize', function() {     var minheight = window.innerheight;     minheight -= 345;     $('main-container').setstyle({         'min-height' : minheight+'px'     }); });

shouldnt minheight : minheight 'min-height' : minheight+'px'


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