1 <!DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 2 <html xmlns="http://www.w3.org/1999/xhtml"><head> 3 <meta http-equiv="Content-Type" content="text/html; charset=gbk"> 4 <title>用parseInt解析数字，并求和</title> 5 <style type="text/css"> 6 body{font:12px/1.5 arial;text-align:center;} 7 .f-text{width:50px;border:1px solid #ccc ;background:#f0f0f0;font-family:inherit;padding:3px;} 8 span{color:green;padding-right:10px;font-weight:700;} 9 strong{padding:0 10px;} 10 </style> 11 </head> 12 <body> 13 <input class="f-text" type="text" /> 14 <strong>+</strong> 15 <input class="f-text" type="text" /> 16 <strong>=</strong> 17 <span>?</span> 18 <input value="求和" type="button"/> 19 <script type="text/javascript"> 20 window.onload = function(){ 21 var inputs = document.getElementsByTagName("input"); 22 var span = document.getElementsByTagName("span")[0]; 23 for(var i=0;i<inputs.length-1;i++){ 24 inputs[i].onkeyup = function(){ 25 this.value = this.value.replace(/([^d])/,""); 26 } 27 } 28 29 inputs[2].onclick = function(){ 30 span.innerHTML = parseInt(inputs[0].value) + parseInt(inputs[1].value); 31 } 32 } 33 </script> 34 </body> 35 </html>