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  <!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=gb2312" /> <TITLE> 日期格式限制</TITLE> <style> input{font-size:12px;} </style> <script type="text/javascript"> /* *** http://www.hansir.cn *** */ var date_help = function(inp, divide){ this.inp = document.getElementById(inp); this.divide = divide; this.format = 'YYYY'+divide+'MM'+divide+'DD'; //顯示字符樣式 this.styleH='<span style="font-weight:bold; color:green">'; this.styleB='</span>'; this.load(); // 初始化 } date_help.prototype={ load: function(){ // 創建一個用于顯示提示的DIV并設置樣式 var div = document.createElement('div'); div.setAttribute('style', 'height:21px; line-height:21px;font-family:宋體; font-size:13px; letter-spacing:1px; text-align:center; background:#fffff6; color:#f60; border:1px solid #ccc; border-top:0; position:absolute; visibility:hidden'); div.style.cssText = 'height:21px; line-height:21px; font-family:宋體; font-size:13px; letter-spacing:1px; text-align:center; background:#fffff6; color:#f60; border:1px solid #ccc; border-top:0; position:absolute; visibility:hidden'; div.innerHTML = this.format; this.div = div; document.body.appendChild(div); // 設置DIV的位置 var inp = this.inp; var inpW = inp.offsetWidth, inpH = inp.offsetHeight; var left = 0, top = 0; while(inp != null){ // 計算輸入框在頁面里的坐標給提示框使用 left += inp.offsetLeft; top += inp.offsetTop; inp = inp.offsetParent; } this.div.style.height = '21px'; this.div.style.width = inpW-2 + 'px'; this.div.style.left = left + 'px'; this.div.style.top = inpH+top + 'px'; // 加載輸入框事件 var oThis = this; this.inp.onfocus = function(){ oThis.inp_v.call(oThis); } this.inp.onblur = function(){ oThis.inp_h.call(oThis); } this.inp.onkeypress = function(e){ //鍵盤按下事件 e?intKey=e.which:intKey=event.keyCode; return oThis.inp_press.call(oThis, intKey); } this.inp.onkeyup = function(e){ e?intKey=e.which:intKey=event.keyCode; oThis.inp_chk.call(oThis,intKey); } }, inp_v: function(){ // 提示信息顯示 this.div.style.visibility = 'visible'; }, inp_h: function(){ // 提示信息顯示 if(new RegExp('^\\d+'+this.divide+'\\d'+this.divide).test(this.inp.value)){ // 月數補0 this.inp.value = this.inp.value.replace(new RegExp('^(\\d+'+this.divide+')(\\d)(?='+this.divide+')'),'$10$2'); this.parseDate(); this.parseFormat(); } if(new RegExp('^\\d+'+this.divide+'\\d+'+this.divide+'\\d$').test(this.inp.value)){ // 天數補0 this.inp.value = this.inp.value.replace(/(\d)$/,'0$1'); this.parseDate(); this.parseFormat(); } this.div.style.visibility = 'hidden'; }, inp_press: function(intKey){ //鍵鍵按下事件只接受數字和分隔符 return (new RegExp('[\\d'+this.divide+']').test(String.fromCharCode(intKey)) || (intKey==0||intKey==8)); }, inp_chk: function(intkey){ // 格式化日期及提示信息樣式 if(intKey==37||intKey==39)return; // 左右鍵不檢測 this.parseDate(intKey); // 格式化日期 this.parseFormat(); // 格式化提示信息 }, parseDate: function(intKey){ // 格式化日期 var intDate = this.inp.value.replace(/\s/g,''); var divide=this.divide; var strDateArray = intDate.split(divide); strDateArray[0]?intYear = strDateArray[0].replace(/^(\d*).*$/,'$1'):intYear=''; strDateArray[1]?intMonth = strDateArray[1].replace(/^(\d*).*$/,'$1'):intMonth=''; strDateArray[2]?intDay = strDateArray[2].replace(/^(\d*).*$/,'$1'):intDay=''; if((intKey==8 || intKey==46) && (!strDateArray[0]||strDateArray[0].length<5)&&(!strDateArray[1] || strDateArray[1].length<3) && (!strDateArray[2]||strDateArray[2].length<3))return intDate; // 退格鍵檢測 isNaN(intYear)?intYear='':intYear=intYear.slice(0,4); isNaN(intMonth)?intMonth='':intMonth=intMonth.slice(0,2); isNaN(intDay)?intDay='':intDay=intDay.slice(0,2); // 判斷在修改階段 if(intYear.length<4 && (intMonth!='' || intDay!='')){ if(strDateArray[1].length<3 && strDateArray[2]<3)return intDate; } if(intMonth.length<2 && intDay!=''){ if(strDateArray[0].length<4 && strDateArray[2]<3)return intDate; } if(intMonth.slice(0,1)>1)intMonth='0'+intMonth.slice(0,1); if(intMonth>12){ var m='0'+intMonth.slice(0,1); var d=intMonth.slice(1,2); intMonth = m; if(intDay=='')intDay=d; } var intM=Number(intMonth); if(intM == 1 || intM == 3 || intM == 5 || intM == 7 || intM == 8 || intM == 10 || intM == 12){ if(intDay.slice(0,1)>3)intDay='0'+intDay.slice(0,1); intDay>31?intDay=intDay.slice(0,1):''; } if(intM == 4 || intM == 6 || intM == 9 || intM == 11){ if(intDay.slice(0,1)>3)intDay='0'+intDay.slice(0,1); parseInt(intDay)>30?intDay=intDay.slice(0,1):''; } if(intM == 2){ boolLeapYear = false; if ((intYear % 100) === 0) { if ((intYear % 400) === 0) { boolLeapYear = true; } } else { if ((intYear % 4) === 0) { boolLeapYear = true; } } if (boolLeapYear) { if(intDay.slice(0,1)>2)intDay='0'+intDay.slice(0,1); } else { if(intDay.slice(0,1)>2)intDay='0'+intDay.slice(0,1); if (intDay > 28)intDay=intDay.slice(0,1); } } temDate = ''; if(intYear!='')intYear.length==4 ? temDate = intYear + divide : temDate = intYear; if(intMonth!='')intMonth.length==2 ? temDate = intYear + divide + intMonth + divide : new RegExp('\\d+'+divide+'\\d+'+divide).test(intDate) ? temDate=intYear+divide+'0'+intMonth+divide:temDate = intYear + divide + intMonth; if(intDay!='')temDate=intYear+divide+intMonth+divide+intDay; this.inp.value=temDate; return temDate; }, parseFormat: function(){ //格式化提示信息 var intDate = this.inp.value; if(!intDate){ this.div.innerHTML=this.format; return; } var format = this.format; // 提示字符 var divide = this.divide; var uarr = intDate.split(divide), farr = format.split(divide) // 用戶輸入的字符分組 var styleH = this.styleH, styleB = this.styleB; var y=farr[0], m=farr[1], d=farr[2]; // 年, 月, 日 if(uarr!='')y=styleH+y.slice(0,uarr[0].length)+styleB+y.slice(uarr[0].length,y.length); if(uarr[1]!='' && uarr[1]!=null){ m=styleH+divide+m.slice(0,uarr[1].length)+styleB+m.slice(uarr[1].length,m.length); }else{ new RegExp('\\d*'+divide).test(intDate)?m=styleH+divide+styleB+m:m=divide+m; } if(uarr[2]!=''&&uarr[2]!=null){ d=styleH+divide+d.slice(0,uarr[2].length)+styleB+d.slice(uarr[2].length,d.length); }else{ new RegExp('\\d*?'+divide+'\\d*?'+divide).test(intDate)?d=styleH+divide+styleB+d:d=divide+d; } this.div.innerHTML= y+m+d; } } window.onload = function(){ new date_help('birthday', '-'); new date_help('birthday2', '/'); } </script> </HEAD> <body> 告訴你一個應有盡有的網頁特效網址：<a href="http://js.alixixi.com">http://js.alixixi.com</a> <hr /> <div> 日期1：<input type="text" id="birthday" /><br/><br /><br /> 日期2：<input type="text" id="birthday2" /><br/><br /><br /> </div> </body> </html>

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