JavaScript网页特效实例大全

				
				
				
				
				
				
				adTime=15;
				chanceAd=1;
				
				var ie=(document.all);
				adCount=0;
				
				function initAd(){
				       
				        if(ie)                adDiv=eval('document.all.sponsorAdDiv.style');
				        
				        randAd=Math.ceil(Math.random()*chanceAd);
				        if (ie)
				        adDiv.visibility="visible";
				       
				        if(randAd==1) showAd();
				}
				
				function showAd(){
				     if(adCount						adCount+=1;
				        
				       
				       
				        setTimeout("showAd()",10);
				     }
				     else 
				       closeAd();
				}
				
				function closeAd(){
				 if (ie)
				  adDiv.display="none";
				 
				}
				
				onload=initAd;
				
				
				
				
				
				
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