网页代码设计技巧系列之---点击后图片消失.doc

脚本说明:把如下代码加入区域中var Ymax=8; /MAX # OF PIXEL STEPS IN THE X DIRECTIONvar Xmax=8; /MAX # OF PIXEL STEPS IN THE Y DIRECTIONvar Tmax=10000; /MAX # OF MILLISECONDS BETWEEN PARAMETER CHANGESvar floatimages=new Array();floatimages0=butterfly.gif;floatimages1=butterfly.gif;/*DO NOT EDIT BELOW*var NS4 = (navigator.appName.indexOf(Netscape)=0 & parseFloat(navigator.appVersion) = 4 & parseFloat(navigator.appVersion) = 5 & navigator.appName.indexOf(Netscape)=0 )? true: false;var wind_w, wind_h, t=, IDs=new Array();for(i=0; ifloatimages.length; i+)t+=(NS4)? : ;t+=;t+=(NS4)? :;document.write(t);function moveimage(num)if(getidleft(num)+IDsnum.W+IDsnum.Xstep = wind_w+getscrollx()IDsnum.Xdir=false;if(getidleft(num)-IDsnum.Xstep= wind_h+getscrolly()IDsnum.Ydir=false;if(getidtop(num)-IDsnum.Ystep0;IDsnum.Xdir=Math.floor(Math.random()*2)0;IDsnum.Ystep=Math.ceil(Math.random()*Ymax);IDsnum.Xstep=Math.ceil(Math.random()*Xmax)setTimeout(getnewprops(+num+), Math.floor(Math.random()*Tmax);function getscrollx()if(NS4 | NS6)return window.pageXOffset;if(IE4)return document.body.scrollLeft;function getscrolly()if(NS4 | NS6)return window.pageYOffset;if(IE4)return document.body.scrollTop;function getid(name)if(NS4)return document.layersname;if(IE4)return document.allname;if(NS6)return document.getElementById(name);function moveidto(num,x,y)if(NS4)IDsnum.moveTo(x,y);if(IE4 | NS6)IDsnum.style.left=x+px;IDsnum.style.top=y+px;function getidleft(num)if(NS4)return IDsnum.left;if(IE4 | NS6)return parseInt(IDsnum.style.left);function getidtop(num)if(NS4)return IDsnum.top;if(IE4 | NS6)return parseInt(IDsnum.style.top);function moveidby(num,dx,dy)if(NS4)IDsnum.moveBy(dx, dy);if(IE4 | NS6)IDsnum.style.left=(getidleft(num)+dx)+px;IDsnum.style.top=(getidtop(num)+dy)+px;function getwindowwidth()if(NS4 | NS6)return window.innerWidth;if(IE4)return document.body.clientWidth;function getwindowheight()if(NS4 | NS6)return window.innerHeight;if(IE4)return document.body.clientHeight;function init()wind_w=getwindowwidth();wind_h=getwindowheight();for(i=0; ifloatimages.length; i+)IDsi=getid(pic+i);if(NS4)IDsi.W=IDsi.document.imagesp+i.width;IDsi.H=IDsi.document.imagesp+i.height;if(NS6 | IE4)IDsi.W=document.imagesp+i.width;IDsi.H=document.imagesp+i.height;getnewprops(i);moveidto(i , Math.floor(Math.random()*(wind_w-IDsi.W), Math.floor(Math.random()*(wind_h-IDsi.H);if(NS4)IDsi.visibility = show;if(IE4 | NS6)IDsi.style.visibility = visible;startfly=setInterval(moveimage(+i+),Math.floor(Math.random()*100)+100);function hidebutterfly()for(i=0; ifloatimages.length; i+)if (IE4)eval(document.all.pic+i+.style.visibility=hidden)else if (NS6)document.getElementById(pic+i).style.visibility=hiddenelse if (NS4)eval(document.pic+i+.visibilit