javascript实现日期格式转换_javascript技巧

<script><br /> window.onload = function(){<br /> var aLaydate = document.getElementsByClassName("date");<br /> for(var i = 0;i < aLaydate.length;i ++)<br /> {<br /> aLaydate[i].onchange = function(){<br /> var dateValue = this.value;<br /> dateValue = dateValue.replace(/\。/g,"-");<br /> dateValue = dateValue.replace(/\./g,"-");<br /> if(dateValue.length == 8){<br /> var temp = dateValue.substring(0,4) + "-" + dateValue.substring(4,6) + "-" + dateValue.substring(6,8);<br /> dateValue = temp;<br /> console.log(dateValue);<br /> }<br /> if(CheckDT(dateValue)){<br /> this.value = dateValue;<br /> }<br /> else<br /> {<br /> alert("日期输入错误");<br /> }<br /> }<br /> }<br /> }<br /> <br /> function CheckDT(str) <br /> { <br /> var r = str.match(/^(\d{1,4})(-|\/)(\d{1,2})\2(\d{1,2})$/); <br /> if(r==null)<br /> {<br /> return false; <br /> }<br /> else<br /> {<br /> var d= new Date(r[1], r[3]-1, r[4]); <br /> return (d.getFullYear()==r[1]&&(d.getMonth()+1)==r[3]&&d.getDate()==r[4]);<br /> } <br /> }<br /> </script>