function isNum(arg)
{
	var args = arg;

	if (args == "" || args == null || args.length == 0)
	{
		return false;
	}

	args = args.toString();

	for (var i = 0;  i<args.length;  i++)
	{
		if ((args.substring(i,i+1) < "0" || args.substring(i, i+1) > "9") && args.substring(i, i+1) != ".")
		{
		return false;
		}
	}
	return true;
}

function checkday(aa)
{
	var val = aa.value;
	var valc = val.substring(0,1);

	if(val.length>0 && val.length<3)
	{
		if(!isNum(val) || val == 0)
		{
			aa.value="";
		}
		else if( val < 1 || val > 31)
		{
			aa.value=valc;
		}
	}
	else if(val.length>2)
	{
		val = val.substring(0, 2);
		aa.value=val;
	}
	
}

function checkmon(aa)
{
	var val = aa.value;
	var valc = val.substring(0,1);

	if(val.length>0 && val.length<3)
	{
		if(!isNum(val) || val == 0)
		{
			aa.value="";
		}
		else if(val < 1 || val > 12)
		{
			aa.value=valc;
		}
	}
	else if(val.length>2)
	{
		val = val.substring(0, 2);
		aa.value=val;
	}
}

function checkyear(aa)
{
	var val = aa.value;
	var valc = val.substring(0,(val.length-1));

	if(val.length>0 && val.length<7)
	{
		if(!isNum(val) || val == 0)
		{
			aa.value=valc;
		}
		else if(val < 1 || val>275759)
		{
			aa.value="";
		}
	}
	else if(val.length>4)
	{
		aa.value=valc;
	}
}

function checkleapyear(datea)
{
	if(datea.getYear()%4 == 0)
	{
		if(datea.getYear()% 10 != 0)
		{
			return true;
		}
		else
		{
			if(datea.getYear()% 400 == 0)
				return true;
			else
				return false;
		}
	}
return false;
}


function DaysInMonth(Y, M) {
    with (new Date(Y, M, 1, 12)) {
      setDate(-2);
      return getDate();
    }
}


function datediff(date1, date2) 
{
    var y1 = date1.getFullYear(), m1 = date1.getMonth(), d1 = date1.getDate(),
	 y2 = date2.getFullYear(), m2 = date2.getMonth(), d2 = date2.getDate();
    if (d1 < d2) 
    {
        m1--;
        d1 += DaysInMonth(y2, m2);
    }
    if (m1 < m2) 
    {
        y1--;
        m1 += 12;
    }
    return [y1 - y2, m1 - m2, d1 - d2];
}

function calage()
{
	var curday = document.cir.len11.value;
	var curmon = document.cir.len12.value;
	var curyear = document.cir.len13.value;
	var calday = document.cir.len21.value;
	var calmon = document.cir.len22.value;
	var calyear = document.cir.len23.value;
	if(curday == "" || curmon=="" || curyear=="" || calday=="" || calmon=="" || calyear=="")
	{
		alert("please fill all the values and click go -");
	}	
	else
	{
		var curd = new Date(curyear,curmon-1,curday);
		var cald = new Date(calyear,calmon-1,calday);
		
		var diff =  Date.UTC(curyear,curmon-1,curday,0,0,0)
			 - Date.UTC(calyear,calmon-1,calday,0,0,0);

		var dife = datediff(curd,cald);
		if(checkleapyear(cald)==true)
		{
			document.cir.val.value=dife[0]+" years, "+dife[1]+" months, and "+dife[2]+" days";

		}else{
			document.cir.val.value=dife[0]+" years, "+dife[1]+" months, and "+dife[2]+" days";
		}
		var secleft = diff/1000/60;
		//document.cir.val3.value=secleft+" minutes since your birth";

		var hrsleft = secleft/60;
		//document.cir.val2.value=hrsleft+" hours since your birth";
	
		var daysleft = hrsleft/24;
		document.cir.val1.value=daysleft+" days gap";	
		
		//alert(""+parseInt(calyear)+"--"+dife[0]+"--"+1);
		var as = parseInt(calyear)+dife[0]+1;

	}
}

function color(test)
{

	for(var j=7; j<9; j++)
	{
		var myI=document.getElementsByTagName("input").item(j);
		//myI.setAttribute("style",ch);
		myI.style.backgroundColor=test;
	}
}


function color1(test)
{
var myI=document.getElementsByTagName("table").item(0);
//myI.setAttribute("style",ch);
myI.style.backgroundColor=test;
}