/*验证日期的合法性*/
function isDate(objyear,objmon,objday){
var year = objyear.value;
var mon = objmon.value;
var day = objday.value;
var count = -1;
switch (mon)
{
case '1':
case '3':
case '5':
case '7':
case '8':
case '10':
case '12':
count = 31;
break;
case '4':
case '6':
case '9':
case '11':
count = 30;
break;
case '2':
if (year % 4 == 0)
count = 29;
else
count = 28;
if ((year % 100 == 0) & (year % 400 != 0))
count = 28;
}
if (day > count){
alert(year+"年"+mon+"月没有"+day+"号!");
return false;
}
else
return true;
}