function CheckData1(MyForm) {
	
	if (MyForm.mm1.value=='04' || MyForm.mm1.value=='06' || MyForm.mm1.value=='09' ||MyForm.mm1.value=='11'){
		if (MyForm.gg1.value==31){
			MyForm.gg1.value=30;
		}
	}
	if (MyForm.mm1.value=='02'){
		if (MyForm.aa1.value=='2004' || MyForm.aa1.value=='2008' || MyForm.aa1.value=='2012' || MyForm.aa1.value=='2016' || MyForm.aa1.value=='2020' || MyForm.aa1.value=='2024' || MyForm.aa1.value=='2028' || MyForm.aa1.value=='2032'){
			if (MyForm.gg1.value>29){
				MyForm.gg1.value=29;
			}
		} else {
			if (MyForm.gg1.value>28){
				MyForm.gg1.value=28;
			}
		}
	}

	CheckDataMaggiore(MyForm);
}

function CheckData2(MyForm) {
	
	if (MyForm.mm2.value=='04' || MyForm.mm2.value=='06' || MyForm.mm2.value=='09' ||MyForm.mm2.value=='11'){
		if (MyForm.gg2.value==31){
			MyForm.gg2.value=30;
		}
	}
	if (MyForm.mm2.value=='02'){
		if (MyForm.aa2.value=='2004' || MyForm.aa2.value=='2008' || MyForm.aa2.value=='2012' || MyForm.aa2.value=='2016' || MyForm.aa2.value=='2020' || MyForm.aa2.value=='2024' || MyForm.aa2.value=='2028' || MyForm.aa2.value=='2032'){
			if (MyForm.gg2.value>29){
				MyForm.gg2.value=29;
			}
		} else {
			if (MyForm.gg2.value>28){
				MyForm.gg2.value=28;
			}
		}
	}
	CheckDataMaggiore(MyForm);
}

function CheckDataMaggiore(MyForm) 
{	if (MyForm.aa2.value<MyForm.aa1.value)
	{
		MyForm.aa2.value=MyForm.aa1.value;
	}
	if (MyForm.aa2.value==MyForm.aa1.value)
	{
		if (MyForm.mm2.value<MyForm.mm1.value)
		{
			MyForm.mm2.value=MyForm.mm1.value;
		}
		
		if (MyForm.mm2.value==MyForm.mm1.value)
		{
			if (MyForm.gg2.value<MyForm.gg1.value)	
			{
				MyForm.gg2.value=MyForm.gg1.value;
			}
		}
	}
}