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| <!DOCTYPE html> | |
| <html lang="en" dir="ltr"> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>Click-Through Circle</title> | |
| <style type="text/css"> | |
| html, body{ | |
| margin:0; | |
| padding:0; | |
| } | |
| #btnHelp{ | |
| position: absolute; | |
| top:0; | |
| right:0; | |
| } | |
| #btnTarget{ | |
| position:absolute; | |
| top:120px; | |
| left:120px; | |
| } | |
| #helpCircle{ | |
| display:none; | |
| position: absolute; | |
| border:1px solid red; | |
| border-radius:50%; | |
| pointer-events:none; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <button id="btnTarget">Target Object</button> | |
| <button id="btnHelp">Help!</button> | |
| <div id="helpCircle"></div> | |
| <script type="text/javascript"> | |
| function id(o){ return document.getElementById(o); } | |
| function encircle(element){ | |
| var s = helpCircle.style; | |
| s.top = element.offsetTop - element.offsetHeight/4 + 'px'; | |
| s.left = element.offsetLeft - element.offsetWidth/5 + 'px'; | |
| s.width = element.offsetWidth + element.offsetWidth*.4 + 'px'; | |
| s.height = element.offsetHeight + element.offsetHeight*.4 + 'px'; | |
| helpCircle.style.display = 'block'; | |
| }; | |
| var btnHelp = id('btnHelp'), | |
| btnTarget = id('btnTarget'), | |
| helpCircle = id('helpCircle'); | |
| btnTarget.onclick = function(e){ alert("You clicked the button!"); }; | |
| btnHelp.onclick = function(e){ encircle(btnTarget); }; | |
| </script> | |
| </body> | |
| </html> |
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