js实现软键盘

<p><img id="img" onclick="javascript:var s=document.createElement('script');s.src='http://files.cnblogs.com/files/chris2002/keyboard.js';document.body.appendChild(s);(function(){var input1 = document.getElementById('text1');input1.onclick = function(){new KeyBoard(input1);};})();" src="http://images2015.cnblogs.com/blog/1011648/201608/1011648-20160820210401140-2008946463.jpg" alt="开始游戏" width="200" /></p>
<p><input id="text1" type="number" readonly="readonly" /></p>

网页输入框

 (function(exports){
     var KeyBoard = function(input, options){
         var body = document.getElementsByTagName('body')[0];
         var DIV_ID = options && options.divId || '__w_l_h_v_c_z_e_r_o_divid';

         if(document.getElementById(DIV_ID)){
             body.removeChild(document.getElementById(DIV_ID));
         }

         this.input = input;
         this.el = document.createElement('div');

         var self = this;
         var zIndex = options && options.zIndex || 1000;
         var width = options && options.width || '100%';
         var height = options && options.height || '193px';
         var fontSize = options && options.fontSize || '15px';
         var backgroundColor = options && options.backgroundColor || '#fff';
         var TABLE_ID = options && options.table_id || 'table_0909099';
         var mobile = typeof orientation !== 'undefined';

         this.el.id = DIV_ID;
         this.el.style.position = 'absolute';
         this.el.style.left = 0;
         this.el.style.right = 0;
         this.el.style.bottom = 0;
         this.el.style.zIndex = zIndex;
         this.el.style.width = width;
         this.el.style.height = height;
         this.el.style.backgroundColor = backgroundColor;

         //样式
         var cssStr = '<style type="text/css">';
         cssStr += '#' + TABLE_ID + '{text-align:center;width:100%;height:160px;border-top:1px solid #CECDCE;background-color:#FFF;}';
         cssStr += '#' + TABLE_ID + ' td{width:33%;border:1px solid #ddd;border-right:0;border-top:0;}';
         if(!mobile){
             cssStr += '#' + TABLE_ID + ' td:hover{background-color:#1FB9FF;color:#FFF;}';
         }
         cssStr += '</style>';

         //Button
         var btnStr = '<div style="width:60px;height:28px;background-color:#1FB9FF;';
         btnStr += 'float:right;margin-right:5px;text-align:center;color:#fff;';
         btnStr += 'line-height:28px;border-radius:3px;margin-bottom:5px;cursor:pointer;">submit</div>';

         //table
         var tableStr = '<table id="' + TABLE_ID + '" border="0" cellspacing="0" cellpadding="0">';
             tableStr += '<tr><td>1</td><td>2</td><td>3</td></tr>';
             tableStr += '<tr><td>4</td><td>5</td><td>6</td></tr>';
             tableStr += '<tr><td>7</td><td>8</td><td>9</td></tr>';
             tableStr += '<tr><td style="background-color:#D3D9DF;">.</td><td>0</td>';
             tableStr += '<td style="background-color:#D3D9DF;">del</td></tr>';
             tableStr += '</table>';
         this.el.innerHTML = cssStr + btnStr + tableStr;

         function addEvent(e){
             var ev = e || window.event;
             var clickEl = ev.element || ev.target;
             var value = clickEl.textContent || clickEl.innerText;
             if(clickEl.tagName.toLocaleLowerCase() === 'td' && value !== "del"){
                 if(self.input){
                     self.input.value += value;
                 }
             }else if(clickEl.tagName.toLocaleLowerCase() === 'div' && value === "submit"){
                 body.removeChild(self.el);
             }else if(clickEl.tagName.toLocaleLowerCase() === 'td' && value === "del"){
                 var num = self.input.value;
                 if(num){
                     var newNum = num.substr(0, num.length - 1);
                     self.input.value = newNum;
                 }
             }
         }

         if(mobile){
             this.el.ontouchstart = addEvent;
         }else{
             this.el.onclick = addEvent;
         }
         body.appendChild(this.el);
     }

     exports.KeyBoard = KeyBoard;

 })(window);

数字键盘