calendar.js

达内JAVA培训-WEB课程部分项目源代码

function initCalendar(year, month, day)
{
    var now = new Date();
    for (var i = now.getFullYear() - 15; i > now.getFullYear() - 80; i--) 
    {
        var option = new Option (i, i);
        year.options[year.options.length] = option;
    }
	
	for (var i = 1; i <= 12; i++) 
	{
	    var text = i;
	    if(i < 10)
	    {
	        text = "0" + text;
	    }
	    var option = new Option (text, text);
	    month.options[month.options.length] = option;
	}
	
	var yearVal = year.options[year.options.selectedIndex].value;
	var monthVal = month.options[month.options.selectedIndex].value;
  
    var monthHead = new Array(12);                        
    monthHead[0] = 31; 
    monthHead[1] = 28; 
    monthHead[2] = 31; 
    monthHead[3] = 30; 
    monthHead[4]  = 31; 
    monthHead[5]  = 30; 
    monthHead[6] = 31; 
    monthHead[7] = 31; 
    monthHead[8] = 30; 
    monthHead[9] = 31; 
    monthHead[10] = 30; 
    monthHead[11] = 31; 
    
    var maxDay = monthHead[monthVal - 1];
    
    if(monthVal == 2)
    { 
        if(isLeapYear(yearVal))
        {
            maxDay = 29;
        }
    }
	
	for(var i = day.length - 1; i >= 0; i--)
	{      
		day.remove(i);
	}
	
	for( var i = 1; i < maxDay + 1; i++) 
	{
	    var text = i;
	    if(i < 10)
	    {
	        text = "0" + text;
	    }
	    
		day.options[day.options.length] = new Option (text, text);
	}
}

function isLeapYear(year)
{ 
	if(year % 4 == 0 && ((year % 100 != 0) || (year % 400 == 0)))
	{
	    return true;
	}
	
	return false; 
}