var iopacaty =100; var timerid = null; var frog = new Image(); frog.src="images/frog.jpg"; var froggold = new Image(); froggold.src="images/froggold.jpg"; var bike = new Image(); bike.src="images/bike.jpg"; var bikegold = new Image(); bikegold.src="images/bikegold.jpg"; /* 检测浏览器 */ var ns4 = (document.layers)?true:false; var dom = (document.getElementById)?true:false; if(window.navigator.appName == "Netscape" && dom) var ns6_7 = true; if(document.all && !dom) var ie4 = true; /* 以下是透明度效果 */ function alphaImgOver(obj1,obj2,obj3,obj4,objimg,imgsrc) { for(var i =100;i>40;i--) { if(dom && !ns6_7) { eval("document.all(objimg).src=" + imgsrc + ".src") document.all(obj1).style.filter ="progid:DXImageTransform.Microsoft.Alpha(opacity="+ i +")" document.all(obj2).style.filter ="progid:DXImageTransform.Microsoft.Alpha(opacity="+ i +")" } if(ns6_7) { eval("document.getElementById(objimg).src=" + imgsrc + ".src") document.getElementById(obj1).style.MozOpacity=i+"%" } } if(dom && !ns6_7) { document.all(obj3).style.filter ="progid:DXImageTransform.Microsoft.Alpha(opacity=100)" document.all(obj4).style.filter ="progid:DXImageTransform.Microsoft.Alpha(opacity=100)" } if(ns6_7) document.getElementById(obj3).style.MozOpacity="99%" } function alphaImgOut(obj1,obj2,obj3,obj4,objimg,imgsrc) { if(dom && !ns6_7) { eval("document.all(objimg).src=" + imgsrc + ".src") document.all(obj1).style.filter ="progid:DXImageTransform.Microsoft.Alpha(opacity=40)" document.all(obj2).style.filter ="progid:DXImageTransform.Microsoft.Alpha(opacity=40)" document.all(obj3).style.filter ="progid:DXImageTransform.Microsoft.Alpha(opacity=40)" document.all(obj4).style.filter ="progid:DXImageTransform.Microsoft.Alpha(opacity=40)" } if(ns6_7) { eval("document.getElementById(objimg).src=" + imgsrc + ".src") document.getElementById(obj1).style.MozOpacity="40%" document.getElementById(obj3).style.MozOpacity="40%" } } /* 没有元素时的情况 */ function notallAlpha() { if( iopacaty > 35 ) { if(dom && !ns6_7) { document.all.frog1.style.filter ="progid:DXImageTransform.Microsoft.Alpha(opacity="+iopacaty+")" document.all.frog2.style.filter ="progid:DXImageTransform.Microsoft.Alpha(opacity="+iopacaty+")" document.all.bike1.style.filter ="progid:DXImageTransform.Microsoft.Alpha(opacity="+iopacaty+")" document.all.bike2.style.filter ="progid:DXImageTransform.Microsoft.Alpha(opacity="+iopacaty+")" } if(ns6_7) { document.getElementById("frog1").style.MozOpacity=iopacaty+"%" document.getElementById("bike1").style.MozOpacity=iopacaty+"%" } iopacaty -= 5; } } function opacityNot() { timerid = setInterval("notallAlpha()",100); } function countTb() { if(dom || ie4) { var ht1 = (dom)?document.getElementById("td0").offsetHeight : document.all.td0.clientHeight; var ht2 = (dom)?document.getElementById("tb2").offsetHeight : document.all.tb2.clientHeight; var ht = Math.round((ht1 - ht2)/2); if(dom) { document.getElementById("tb1").style.height = ht + "px" document.getElementById("tb3").style.height = ht + "px" } else { document.all.tb1.style.height = ht + "px" document.all.tb3.style.height = ht + "px" } } if(ns4) { if(confirm("download Netscape 6.22 ")) window.top.location = "http://www.netscape.com" else window.location = "main.html" } }