var TEXT = 1;

var NUMBER = 2;

var EMAIL = 3;

var DATE = 4;

var DATETIME = 5;

var TIME = 6;





function validate_optionalfield(field_obj, field_name, field_type)  {

  if (field_obj.value.search(/\S/)>= 0) {

    return validate_field(field_obj, field_name, field_type); 

  }

  else  {

    return 1;

  }

}



function validate_field(field_obj, field_name, field_type)  {

	//field_obj must be a valid form field

    if (field_obj.value.search(/\S/)==-1)   {

        alert("Please fill in " + field_name);

        field_obj.focus();

        return 0;

    }

    else    {

        //checking for email if needed

        if (field_type == EMAIL)    {

            if (field_obj.value.search(/^[^@ ]+@[^@ ]+\.[^@ \.]+$/) == -1)   {

                alert("Please fill in valid " + field_name);

                field_obj.focus();

                return 0;

            }

                return 1;

        }

        else if (field_type == NUMBER)  {

            if (isNaN(field_obj.value)) {

                alert("Please fill in valid " + field_name);

                field_obj.focus();

                return 0;

            }

            else

                return 1;

        }



		else if (field_type == DATE)    {

			if (field_obj.value.length == 10 &&

				field_obj.value.search(/(0[1-9]|[12][0-9]|3[01])\/(0[1-9]|1[012])\/(19|20)\d\d/) >= 0)    {

				parts = field_obj.value.split("/");

                d = parseInt(parts[0]);

                m = parseInt(parts[1]);

                y = parseInt(parts[2]);



                //get the wrong dates

                if ((d>=30 && m==2) ||

                    (d==31 && (m==2 || m==4 || m==6 || m==9 || m==11)) ||

                    (d==29 && m==2 && !(((y % 4 == 0) && (y % 100 != 0)) || (y % 400 == 0))))   {

					alert("Please fill in valid " + field_name + "(dd/mm/yyyy)");

            		field_obj.focus();

					return 0;

                }

                else

                    return 1;

			}

			else    {

			    alert("Please fill in valid " + field_name + "(dd/mm/yyyy)");

                field_obj.focus();

				return 0;

			}

		}

		

		

		else if (field_type == TIME)    {

		    if (field_obj.value.length == 5)    {

		        parts = field_obj.value.split(":");

		        if (parts.length == 2)  {

		            h = parts[0];

		            m = parts[1];

		            if (h>=0 && h<=23 && m>=0 && m<=59)

						return 1;

					else    {

					    alert("Please fill in valid " + field_name + "(hh:mm)");

        				field_obj.focus();

						return 0;

					}

		        }

		        else    {

		            alert("Please fill in valid " + field_name + "(hh:mm)");

					field_obj.focus();

					return 0;

		        }

		    }

		    else    {

		        alert("Please fill in valid " + field_name + "(hh:mm)");

				field_obj.focus();

				return 0;

		    }

		}





		else if (field_type == DATETIME)    {

			parts = field_obj.value.split(" ");

			if (parts.length == 2)  {

			    dates = parts[0];

			    times = parts[1];

				

				if (dates.length == 10 &&

					dates.search(/(0[1-9]|[12][0-9]|3[01])\/(0[1-9]|1[012])\/(19|20)\d\d/) >= 0)  {

	                dateparts = dates.split("/");

	                d = parseInt(dateparts[0]);

	                m = parseInt(dateparts[1]);

	                y = parseInt(dateparts[2]);



	                //get the wrong dates

	                if ((d>=30 && m==2) ||

	                    (d==31 && (m==2 || m==4 || m==6 || m==9 || m==11)) ||

	                    (d==29 && m==2 && !(((y % 4 == 0) && (y % 100 != 0)) || (y % 400 == 0))))   {

						alert("Please fill in valid " + field_name + "(dd/mm/yyyy hh:mm)");

                		field_obj.focus();

						return 0;

	                }

	                else    {

	                    //check time

						timeparts = times.split(":");

						if (timeparts.length == 2)  {

						    h = parseInt(timeparts[0]);

							m = parseInt(timeparts[1]);

							if (h>=0 && h<=23 && m>=0 && m<=59)

								return 1;

							else    {

							    alert("Please fill in valid " + field_name + "(dd/mm/yyyy hh:mm)");

                				field_obj.focus();

								return 0;

							}

						}

						else    {

                            alert("Please fill in valid " + field_name + "(dd/mm/yyyy hh:mm)");

                			field_obj.focus();

							return 0;

						}

					}

                }

                else    {

                    alert("Please fill in valid " + field_name + "(dd/mm/yyyy hh:mm)");

        			field_obj.focus();

					return 0;

                }

			}

			else    {

			    alert("Please fill in valid " + field_name + "(dd/mm/yyyy hh:mm)");

                field_obj.focus();

				return 0;

			}

		}



		else

		    return 1;

	}

}



function validate_sel(obj, fieldname) {

  if (obj.value == 0 || obj.value == "0" || obj.value == "")  {

    alert("Please select " + fieldname);

    obj.focus();

    return false;  

  } 

  else

    return true;

}



function validate_rd(obj, fieldname){

  myOption = -1;

  for (i=obj.length-1; i > -1; i--) {

    if (obj[i].checked) {

      myOption = i; i = -1;

    }

  }

  

  if (myOption == -1) {

    alert("Please select " + fieldname);

    return false;

  }else{

    return true;

  }

}



function checkValidDate(d, m, y, field_name)    {

	if ((d>=30 && m==2) ||

	    (d==31 && (m==2 || m==4 || m==6 || m==9 || m==11)) ||

	    (d==29 && m==2 && !(((y % 4 == 0) && (y % 100 != 0)) || (y % 400 == 0))))   {

		alert("Please fill in valid Date for " + field_name);

		return 0;

    }

    else

        return 1;

}





function compareTimeString(time1, time2)    {

//return 0 if time1 == time2

//return 1 if time1 > time2

//return -1 if time1 < time2

	if (time1 == time2)

	    return 0;



	//split the time first

	time1part = time1.split(":");

	time2part = time2.split(":");



	time1_h = time1part[0];

	time1_m = time1part[1];

	time2_h = time2part[0];

	time2_m = time2part[1];



	//compare

	if (time1_h > time2_h ||

		(time1_h == time2_h && time1_m > time2_m))

	    return 1;

	else

	    return -1;

}





function compareDateString(date1, date2)    {

//return 0 if time1 == time2

//return 1 if time1 > time2

//return -1 if time1 < time2

	if (date1 == date2)

	    return 0;



	//split the time first

	date1part = date1.split("/");

	date2part = date2.split("/");



	date1_d = date1part[0];

	date1_m = date1part[1];

	date1_y = date1part[2];

	date2_d = date2part[0];

	date2_m = date2part[1];

	date2_y = date2part[2];



	//compare

	if ((date1_y > date2_y) ||

	    (date1_y == date2_y && date1_m > date2_m) ||

	    (date1_y == date2_y && date1_m == date2_m && date1_d > date2_d))

	    return 1;

	else

	    return -1;

}





function winpopup(url, win_width, win_height)  {

	sw = screen.width;

	sh = screen.height;



	x = Math.ceil((sw - win_width) / 2);

	y = Math.ceil((sh - win_height) / 2);

	window.open(url, "_blank", "left=" + x + ",top=" + y + ",menubar=no,scrollbars=yes,status=yes,resizable=yes,width=" + win_width + ",height=" + win_height);

}



function winpopup2(url, win_width, win_height)  {

	sw = screen.width;

	sh = screen.height;



	x = Math.ceil((sw - win_width) / 2);

	y = Math.ceil((sh - win_height) / 2);

	window.open(url, "_blank", "left=" + x + ",top=" + y + ",toolbar=no,menubar=no,scrollbars=yes,status=no,resizable=no,width=" + win_width + ",height=" + win_height);

}



function winpopup3(url, win_width, win_height)  {

	sw = screen.width;

	sh = screen.height;



	x = Math.ceil((sw - win_width) / 2);

	y = Math.ceil((sh - win_height) / 2);

	window.open(url, "_blank", "left=" + x + ",top=" + y + ",menubar=no,scrollbars=no,status=yes,resizable=no,width=" + win_width + ",height=" + win_height);

}



//restrict typing beyond maximum length. (used by textarea)

function restrict_length(obj, len)  {

  if (obj.value.length > len) {

    alert("Maximum Length Reach");

    obj.value = obj.value.substr(0, len);

  }

}