1 <html> 2 <head> 3 <style> 4 * { 5 margin:0; 6 padding:0; 7 } 8 #div1{ 9 width:200px; 10 height:200px; 11 background:red; 12 position:relative; 13 left:-200px; 14 top:0; 15 } 16 #div1 span{ 17 width:20px; 18 height:50px; 19 background:skyblue; 20 position:absolute; 21 left:200px; 22 top:75px; 23 } 24 25 26 #testOpacity{ 27 margin-top:50px; 28 width:200px; 29 height:200px; 30 background:red; 31 filter:alpha(opacity:30); 32 opacity:0.3 33 } 34 35 36 #bufferAction{ 37 margin-top:50px; 38 width:200px; 39 height:200px; 40 background:red; 41 position:relative; 42 left:-200px; 43 top:0; 44 } 45 #bufferAction span{ 46 width:20px; 47 height:50px; 48 background:skyblue; 49 position:absolute; 50 left:200px; 51 top:75px; 52 } 53 54 </style> 55 <title>js动画test</title> 56 </head> 57 <body> 58 <div id="div1"> 59 <span id="share">分享</span> 60 </div> 61 <script> 62 var div1=document.getElementById("div1"); 63 div1.onmouseover=function(){ 64 startMove(div1,10,0); 65 } 66 div1.onmouseleave=function(){ 67 startMove(div1,-10,-200); 68 } 69 var timer=null; 70 /*使用offsetLeft实现滑动动画*/ 71 function startMove(obj,speed,target){ 72 clearInterval(timer); 73 timer=setInterval(function(){ 74 if(obj.offsetLeft==target){ 75 clearInterval(timer); 76 }else{ 77 obj.style.left=obj.offsetLeft+speed+"px"; 78 } 79 },30); 80 } 81 </script> 82 83 <div id="testOpacity"> 84 </div> 85 <script> 86 var opacityObj=document.getElementById("testOpacity"); 87 opacityObj.onmouseover=function(){ 88 changeOpacity(this,5,90); 89 } 90 opacityObj.onmouseleave=function(){ 91 changeOpacity(this,5,10); 92 } 93 var opacityTimer=null; 94 /*使用opacity实现渐变*/ 95 function changeOpacity(obj,speed,target){ 96 clearInterval(opacityTimer); 97 var currentOpacity=obj.style.opacity*100; 98 opacityTimer=setInterval(function(){ 99 if(target==currentOpacity){ 100 clearInterval(opacityTimer); 101 }else{ 102 if(target>currentOpacity){ 103 speed=Math.abs(speed); 104 }else{ 105 speed=-Math.abs(speed); 106 } 107 currentOpacity+=speed; 108 obj.style.opacity=currentOpacity/100; 109 obj.style.filter='alpha(opacity:'+currentOpacity+')'; 110 } 111 },30); 112 } 113 </script> 114 115 <div id="bufferAction"> 116 <span id="bufferActionSpan">分享</span> 117 </div> 118 <script> 119 var opacityObj=document.getElementById("bufferAction"); 120 opacityObj.onmouseover=function(){ 121 bufferAction(this,10,0); 122 } 123 opacityObj.onmouseleave=function(){ 124 bufferAction(this,10,-200); 125 } 126 var bufferTimer=null; 127 /*模拟渐进效果*/ 128 function bufferAction(obj,speed,target){ 129 clearInterval(bufferTimer); 130 speed=speed>0? Math.ceil(speed):Math.floor(speed); 131 bufferTimer=setInterval(function(){ 132 if(target==obj.offsetLeft){ 133 clearInterval(bufferTimer); 134 }else{ 135 if(target>obj.offsetLeft){ 136 speed=Math.ceil((target-obj.offsetLeft)/20); 137 }else{ 138 speed=Math.floor((target-obj.offsetLeft)/20); 139 } 140 obj.style.left=obj.offsetLeft+speed+"px"; 141 } 142 },30); 143 } 144 </script> 145 146 </body> 147 148 </html>
1 /* 2 offsetLeft和left的区别: 3 offsetLeft获取相对于父对象的左边距 4 left获取或设置相对于具有定位属性(position定义为relative)的父对象的左边距 5 6 offsetLeft返回的数值,left返回的是带px的字符串 7 style.left是读写的,offsetLeft是只读的 8 */
1 /* 2 css布局: 3 position:absolute相对于使用了position的父级元素,如果没有则以body为参照 4 5 relative相对定位,相对于原来的位置,但是原来的位置仍然保留 6 absolute定位,相对于最近的非标准定位,原来的位置消失,被后边的位置所顶替 7 8 只用absolute和relative定位多样的页面,真是漂亮。 9 10 */
1 /* 2 window.opener: 3 window.opener可以获取转到当前页面的父页面window对象,可以通过其调用父页面的所有对象和方法 4 博客园的tag跳转连接: 5 window.open('/tags/list?id=*****','_blank','width=300,height=500,toolbars=yes,resizable=yes,scrollbars=yes,left='+leftVal+',top='+topVal); 6 7 8 刷新当前页可以用: 9 window.location="javascript:document.location.reload()"; 10 */