<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>累加按钮，自加1</title> <style> body{text-align:center;} input{font:12px arial;cursor:pointer;padding:0 10px;} </style> <script type="text/javascript"> window.onload = function () { var aBtn = document.getElementsByTagName("input")[0]; var i = 0; aBtn.onclick = function () { aBtn.value = ++i; alert(i) } } </script> </head> <body> <input type="button" value="0" /> </body> </html>
输入两个数字，比较大小
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>输入两个数字，比较大小</title> <style> body{font:12px/1.5 arial;text-align:center;} .f-text{50px;border:1px solid #ccc;background:#f0f0f0;font-family:inherit;padding:3px;} .f-btn{margin:0 10px;} strong{padding:0 10px;} span{font-weight:700;color:red;} </style> <script type="text/javascript"> window.onload = function () { var aInput = document.getElementsByTagName("input"); var aSpan = document.getElementsByTagName("span")[0]; var i = 0; for (i = 0; i < aInput.length - 1; i++) { aInput[i].onkeyup = function () { this.value = this.value.replace(/[^d]/,"") } } aInput[2].onclick = function () { (aInput[0].value == "" || aInput[1].value == "") ? alert("请输入数字！") : (aSpan.innerHTML = Math.max(aInput[0].value, aInput[1].value)) ; } }; </script> </head> <body> <input type="text" class="f-text" /><strong>vs</strong><input type="text" class="f-text" /><input type="button" value="最大的数是 »" class="f-btn" /><span>？</span> </body> </html>