//06.07.2006 - Библиотека opacity.js к статье "CSS прозрачность (css opacity, javascript opacity)" - http://www.tigir.com/opacity.htm

function setElementOpacity(oElem,nOpacity)
{var p=getOpacityProperty();(setElementOpacity=p=="filter"?new Function('oElem','nOpacity','nOpacity *= 100; var oAlpha = oElem.filters["DXImageTransform.Microsoft.alpha"] || oElem.filters.alpha; if (oAlpha) oAlpha.opacity = nOpacity; else oElem.style.filter += "progid:DXImageTransform.Microsoft.Alpha(opacity="+nOpacity+")";'):p?new Function('oElem','nOpacity','oElem.style.'+p+' = nOpacity;'):new Function)(oElem,nOpacity);}
function getOpacityProperty()
{var p;if(typeof document.body.style.opacity=='string')p='opacity';else if(typeof document.body.style.MozOpacity=='string')p='MozOpacity';else if(typeof document.body.style.KhtmlOpacity=='string')p='KhtmlOpacity';else if(document.body.filters&&navigator.appVersion.match(/MSIE ([\d.]+);/)[1]>=5.5)p='filter';return(getOpacityProperty=new Function("return '"+p+"';"))();}
function fadeOpacity(sElemId,sRuleName,bBackward)
{var elem=document.getElementById(sElemId);if(!elem||!getOpacityProperty()||!fadeOpacity.aRules[sRuleName])return;var rule=fadeOpacity.aRules[sRuleName];var nOpacity=rule.nStartOpacity;if(fadeOpacity.aProc[sElemId]){clearInterval(fadeOpacity.aProc[sElemId].tId);nOpacity=fadeOpacity.aProc[sElemId].nOpacity;}
if((nOpacity==rule.nStartOpacity&&bBackward)||(nOpacity==rule.nFinishOpacity&&!bBackward))return;fadeOpacity.aProc[sElemId]={'nOpacity':nOpacity,'tId':setInterval('fadeOpacity.run("'+sElemId+'")',fadeOpacity.aRules[sRuleName].nDalay),'sRuleName':sRuleName,'bBackward':Boolean(bBackward)};}
fadeOpacity.addRule=function(sRuleName,nStartOpacity,nFinishOpacity,nDalay){fadeOpacity.aRules[sRuleName]={'nStartOpacity':nStartOpacity,'nFinishOpacity':nFinishOpacity,'nDalay':(nDalay||30),'nDSign':(nFinishOpacity-nStartOpacity>0?1:-1)};};fadeOpacity.back=function(sElemId){fadeOpacity(sElemId,fadeOpacity.aProc[sElemId].sRuleName,true);};fadeOpacity.run=function(sElemId)
{var proc=fadeOpacity.aProc[sElemId];var rule=fadeOpacity.aRules[proc.sRuleName];proc.nOpacity=Math.round((proc.nOpacity+.1*rule.nDSign*(proc.bBackward?-1:1))*10)/10;setElementOpacity(document.getElementById(sElemId),proc.nOpacity);if(proc.nOpacity==rule.nStartOpacity||proc.nOpacity==rule.nFinishOpacity)clearInterval(fadeOpacity.aProc[sElemId].tId);}
fadeOpacity.aProc={};fadeOpacity.aRules={};