function getDateObject(dateString,dateSeperator)
{
    //This function return a date object after accepting 
    //a date string ans dateseparator as arguments
    var curValue=dateString;
    var sepChar=dateSeperator;
    var curPos=0;
    var cDate,cMonth,cYear;

    //extract day portion
    curPos=dateString.indexOf(sepChar);
    cDate=dateString.substring(0,curPos);
    
    //extract month portion				
    endPos=dateString.indexOf(sepChar,curPos+1);			
    cMonth=dateString.substring(curPos+1,endPos);

    //extract year portion				
    curPos=endPos;
    endPos=curPos+5;			
    cYear=curValue.substring(curPos+1,endPos);
    
    dtObject=new Date();
    dtObject.setFullYear(cDate,cMonth,cYear);	
    return dtObject;
}
    
function check_date() 
{
    var dt1=getDateObject(document.getElementById('cal1').value, "-");
    var dt2=getDateObject(document.getElementById('cal2').value, "-");
   
    if(dt1>dt2) {
    	alert("Atvykimo data negali būti didesnė nei išvykimo data!");
        return false;
    } else {
    	return true;
    }

}