var startDate=document.forms ].startDate.value;
var endDate=document.forms[0].endDate.value;
if(DateDiff(endDate,startDate)>3){ >alert ("日の範囲は 3 日を超えてはなりません");
return
}
function DateDiff(endDate,startDate)
{
var arrDate,objDate1,objDate2,intDays;
arrDate=endDate.split("-");
objDate1=new Date(arrDate[1]) arrDate[2] '-' arrDate[0]);
arrDate=startDate.split("-");
objDate2=new Date(arrDate[1] '-' arrDate[ 2] '-' arrDate[0]);
intDays=parseInt(Math.abs(objDate1-objDate2)/1000/60/60/24);
return
}