<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312"> <title>网页特效观止--- 图像圆形虚幻显示特效</title> </head> <body onload=setValues()> <center> <SCRIPT language=JavaScript> <!-- Beginning of JavaScript - var x,y var marginbottom var marginleft=0 var margintop=0 var marginright var cliptop var clipbottom var clipleft var clipright var clippoints var ballheight=150 var ballwidth=150 var imageheight=525 var imagewidth=457 // less is faster var tempo=25 // horizontal move (pixels) within time unit var stepx=12 // vertical move (pixels) within time unit var stepy=6 var timer // check the width and the height of the document // gets the starting position of the ball by random function setValues() { if (document.all) { marginbottom = imageheight-ballheight marginright = imagewidth-ballwidth document.all.ball.style.posLeft=randommaker(400) document.all.ball.style.posTop=0 document.all.textcontent.style.posLeft=0 document.all.textcontent.style.posTop=0 document.all.ball.style.filter="alpha(opacity=0,finishopacity=100,style=2,startX=0px,startY=0px,finishX=100px,finishY=100px)" moveball() } } // randomfunction function randommaker(range) { rand=Math.floor(range*Math.random()) return rand } function moveball() { checkposition() if (document.all) { document.all.ball.style.posLeft+=stepx document.all.ball.style.posTop+=stepy cliptop=document.all.ball.style.posTop clipbottom=cliptop+ballheight clipleft=document.all.ball.style.posLeft clipright=clipleft+ballwidth clippoints="rect("+cliptop+" "+clipright+" "+clipbottom+" "+clipleft+")" document.all.textcontent.style.clip=clippoints timer=setTimeout("moveball()",tempo) } } function checkposition() { if (document.all) { if (document.all.ball.style.posLeft>=marginright) { stepx=stepx*-1 document.all.ball.style.posLeft-=10 } if (document.all.ball.style.posLeft<=marginleft) { stepx=stepx*-1 document.all.ball.style.posLeft+=10 } if (document.all.ball.style.posTop>=marginbottom) { stepy=stepy*-1 document.all.ball.style.posTop-=10 } if (document.all.ball.style.posTop<=margintop) { stepy=stepy*-1 document.all.ball.style.posTop+=10 } } } // - End of JavaScript - --> </SCRIPT> <span id=textcontent style="LEFT: -5000px; POSITION: absolute; TOP: -5000px"><IMG border=0 src="sto/101.jpg"> </span> <span id=ball style="BACKGROUND-COLOR: white; HEIGHT: 150px; POSITION: absolute; TOP: -50px; WIDTH: 150px"></span> </center> </body> </html>
