JS之日历实践附实现代码

时间：2020-11-11 11:33:02|栏目：JavaScript代码|点击：次

程序是这个样子的：首先采集用户输入的年份和月份，经过计算获取该月份的最大天数，并获取月份第一天是星期几。然后在表格中填充该月份的具体信息。

<html> <head> <title>日历测试</title> <script> function getMonthJuZhen(date){ if(arguments.length == 0){ throw new Error("need a date"); } if(arguments[0] == null){ throw new Error("date is null or undefined"); } if(arguments[0] instanceof Date){ var monthjuzhen = new Array(5); for(var r = 0 ; r < 5 ; r++){ monthjuzhen[r] = [0,0,0,0,0,0,0]; } var maxDay = getMaxDay(arguments[0]); arguments[0].setDate(1); var r = 0; var c = arguments[0].getDay(); for(var d = 1 ; d <= maxDay ; d++){ monthjuzhen[r][c] = d; if(c == 6){ if(r == 4){ r = 0; } else{ r++; } c = 0; } else{ c++; } } return monthjuzhen; } else{ throw new Error("need a date"); } } function getMaxDay(date){ if(arguments.length == 0){ throw new Error("need a date"); } if(arguments[0] == null){ throw new Error("date is null or undefined"); } if(arguments[0] instanceof Date){ var tempDate = new Date(arguments[0].toString()); if(arguments[0].getMonth() == 11){ tempDate.setFullYear((tempDate.getFullYear()+1)); tempDate.setMonth(0); } else{ tempDate.setMonth((tempDate.getMonth()+1)); } return Math.floor((tempDate.getTime()-arguments[0].getTime())/(1000*60*60*24)); } else{ throw new Error("need a date"); } } function updateDate(){ var yearInput = document.getElementById("yearinput"); var monthInput = document.getElementById("monthinput"); try{ var year = parseInt(yearInput.value); var month = parseInt(monthInput.value); if(isNaN(year)){ if(isNaN(month)){ monthInput.value = ""; } yearInput.value = ""; return; } if(isNaN(month)){ monthInput.value = ""; return; } if(month > 12 || month < 1){ monthInput.value = ""; return; } month--; var date = new Date(year,month); var monthjuzhen = getMonthJuZhen(date); var day; var dayvalue; for(var r in monthjuzhen){ for(var c in monthjuzhen[parseInt(r)]){ day = document.getElementById(r+"-"+c); dayvalue = monthjuzhen[parseInt(r)][parseInt(c)]; if(dayvalue == 0){ if(day.hasChildNodes()){ day.removeChild(day.firstChild); } day.onmouseover = null; day.onmouseout = null; day.onclick = null; continue; } if(day.hasChildNodes()){ day.firstChild.nodeValue = dayvalue; } else{ day.appendChild(document.createTextNode(dayvalue)); } day.setAttribute("date",year+"-"+month+"-"+dayvalue); day.onmouseover = function(){this.style.backgroundColor = "black";this.style.color = "white";}; day.onmouseout = function(){this.style.backgroundColor = "white";this.style.color = "black"}; day.onclick = subDate; } } } catch(e){ alert(e); } } function subDate(){ var date = this.getAttribute("date").match(/(\d+)-(\d+)-(\d+)/); alert(new Date(date[1],date[2],date[3])); } </script> </head> <body> <div><table style="background-color:white;"> <tr> <td colspan="7"> <input id="yearinput" type="text" size="4" MAXLENGTH="4" onchange="updateDate()"/>年 <input id="monthinput" type="text" size="2" MAXLENGTH="2" onchange="updateDate()"/>月&nbsp;&nbsp;<span onclick="updateDate()">更新</span></td> </tr> <tr> <td>日</td><td>一</td><td>二</td><td>三</td><td>四</td><td>五</td><td>六</td> </tr> <tr> <td id="0-0"></td><td id="0-1"></td><td id="0-2"></td><td id="0-3"></td><td id="0-4"></td><td id="0-5"></td><td id="0-6"></td> </tr> <tr> <td id="1-0"></td><td id="1-1"></td><td id="1-2"></td><td id="1-3"></td><td id="1-4"></td><td id="1-5"></td><td id="1-6"></td> </tr> <tr> <td id="2-0"></td><td id="2-1"></td><td id="2-2"></td><td id="2-3"></td><td id="2-4"></td><td id="2-5"></td><td id="2-6"></td> </tr> <tr> <td id="3-0"></td><td id="3-1"></td><td id="3-2"></td><td id="3-3"></td><td id="3-4"></td><td id="3-5"></td><td id="3-6"></td> </tr> <tr> <td id="4-0"></td><td id="4-1"></td><td id="4-2"></td><td id="4-3"></td><td id="4-4"></td><td id="4-5"></td><td id="4-6"></td> </tr> </table> </div> </body> </html>

[Ctrl+A 全选注:引入外部Js需再刷新一下页面才能执行]

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