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at October 22, 2009 17:50 by jsluv
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var fadeobj2 = function (sender){ var obj = $(sender); var timer = 20; var opStep = 5; var alpha = 0; var iCurrentAlpha = null; var endalpha= 100; var isFading = null; this.fadeIn = function (){ iCurrentAlpha = (iCurrentAlpha===null) ? alpha : iCurrentAlpha; clearInterval(isFading); isFading = setInterval(function(){changeFading(1);},timer); } this.fadeOut = function (){ iCurrentAlpha = (iCurrentAlpha===null) ? endalpha : iCurrentAlpha; clearInterval(isFading); isFading = setInterval(function(){changeFading(-1);},timer); } function changeFading (d){ obj.style.opacity = iCurrentAlpha*0.01; obj.style.filter = 'alpha(opacity=' + iCurrentAlpha+ ')'; iCurrentAlpha= iCurrentAlpha + (opStep * d); if (iCurrentAlpha>endalpha || iCurrentAlpha<alpha) { clearInterval(isFading); } }
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Hi It is my first snipplet. It does simple fade IN/OUT effect. I wanted to make my homepage nice-looking but without jQuery to master bare JavaScript. Usage: The function uses simple $ function to get dom object which is made fading. If you don't know $ function replace it with 'document.getElementById'. Calling instanceName.fadeIn or instanceName.fadeOut with events runs adequate method. Dom objects that are display=none can't work with my code without minor change.
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my simple fade object
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JavaScript