var floatingLayers = [];

function initFloater(layerName, numLayer){
	floatingLayers[numLayer] = new Object()
	floatingLayers[numLayer].Layer=document.getElementById(layerName)
	floatingLayers[numLayer].defPosTop=parseInt(floatingLayers[numLayer].Layer.style.top)
	floatingLayers[numLayer].timer=""
	floatLayer(numLayer)
}

function floatLayer(numLayer){
	floatingLayers[numLayer].pageTop=(document.documentElement.scrollTop ? document.documentElement.scrollTop : document.body.scrollTop)
	clearTimeout(floatingLayers[numLayer].timer)
	floatingLayers[numLayer].step=15
	floatingLayers[numLayer].distance=(floatingLayers[numLayer].pageTop+floatingLayers[numLayer].defPosTop)-parseInt(floatingLayers[numLayer].Layer.style.top)
	floatingLayers[numLayer].divTop=parseInt(floatingLayers[numLayer].Layer.style.top)

	// ACAO SUBIR
	if(floatingLayers[numLayer].divTop<=(floatingLayers[numLayer].pageTop+floatingLayers[numLayer].defPosTop)){
		if(floatingLayers[numLayer].distance>150){
			floatingLayers[numLayer].step=20
		}
		if(floatingLayers[numLayer].distance<20){
			floatingLayers[numLayer].step=1
		}

		floatingLayers[numLayer].divTop+= floatingLayers[numLayer].step
		floatingLayers[numLayer].Layer.style.top =floatingLayers[numLayer].divTop+"px"
		//alert(floatingLayers[numLayer].divTop)
	}
	//fim


	// ACAO DESCER
	if(floatingLayers[numLayer].divTop>=(floatingLayers[numLayer].pageTop+floatingLayers[numLayer].defPosTop)){
		if(floatingLayers[numLayer].distance< -150){
			floatingLayers[numLayer].step=20
	}
			if(floatingLayers[numLayer].distance> -25){
			floatingLayers[numLayer].step=1
		}
		floatingLayers[numLayer].divTop-= floatingLayers[numLayer].step
		floatingLayers[numLayer].Layer.style.top =floatingLayers[numLayer].divTop+"px"
		//alert(floatingLayers[numLayer].divTop)
	}
	//fim

	floatingLayers[numLayer].timer=setTimeout("floatLayer("+numLayer+")",50)

}
//fim function

window.onscroll=function()
{
	for (i=0; i<floatingLayers.length; i++) {
		if(floatingLayers[i] != undefined)
		{
			floatLayer(i)
		}
	}
}

// add onload="initFloater()" to the opening BODY tag