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Adjusting JS Calendar to submit form onclick of a date

Posted on 2008-06-09
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Last Modified: 2008-06-11
HI there,

I'm a little lost.

I have a page that uses a form to select a date, this sets a variable at the top of my page. At the moment I have a textbox that when clicked in shows a javascript calendar. This inputs a date into my textbox field, the user then has to click a button to submit the date.

What I want is for the process to be more streamlined if possible. When the user selects the day on the calendar - I want the form to be submitted. I can't work out how to put this event into JS and HTML? Is it difficult?

I've attached the two relevant parts of my script. JS for the calendar and the HTML form I'm using at the moment.

As an additional request is easy to change the text field to an image as found on http://www.easyjet.com/en/book/index.asp??

Thanks in advance,

Daniel


<script type="text/javascript">
// <!-- <![CDATA[
 
// Project: Dynamic Date Selector (DtTvB) - 2006-03-16
// Script featured on JavaScript Kit- http://www.javascriptkit.com
// Code begin...
// Set the initial date.
var ds_i_date = new Date();
ds_c_month = ds_i_date.getMonth() + 1;
ds_c_year = ds_i_date.getFullYear();
 
// Get Element By Id
function ds_getel(id) {
	return document.getElementById(id);
}
 
// Get the left and the top of the element.
function ds_getleft(el) {
	var tmp = el.offsetLeft;
	el = el.offsetParent
	while(el) {
		tmp += el.offsetLeft;
		el = el.offsetParent;
	}
	return tmp;
}
function ds_gettop(el) {
	var tmp = el.offsetTop;
	el = el.offsetParent
	while(el) {
		tmp += el.offsetTop;
		el = el.offsetParent;
	}
	return tmp;
}
 
// Output Element
var ds_oe = ds_getel('ds_calclass');
// Container
var ds_ce = ds_getel('ds_conclass');
 
// Output Buffering
var ds_ob = ''; 
function ds_ob_clean() {
	ds_ob = '';
}
function ds_ob_flush() {
	ds_oe.innerHTML = ds_ob;
	ds_ob_clean();
}
function ds_echo(t) {
	ds_ob += t;
}
 
var ds_element; // Text Element...
 
var ds_monthnames = [
'January', 'February', 'March', 'April', 'May', 'June',
'July', 'August', 'September', 'October', 'November', 'December'
]; // You can translate it for your language.
 
var ds_daynames = [
'Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'
]; // You can translate it for your language.
 
// Calendar template
function ds_template_main_above(t) {
	return '<table cellpadding="3" cellspacing="1" class="ds_tbl">'
	     + '<tr>'
		 + '<td class="ds_head" style="cursor: pointer" onclick="ds_py();">&lt;&lt;</td>'
		 + '<td class="ds_head" style="cursor: pointer" onclick="ds_pm();">&lt;</td>'
		 + '<td class="ds_head" style="cursor: pointer" onclick="ds_hi();" colspan="3">[Close]</td>'
		 + '<td class="ds_head" style="cursor: pointer" onclick="ds_nm();">&gt;</td>'
		 + '<td class="ds_head" style="cursor: pointer" onclick="ds_ny();">&gt;&gt;</td>'
		 + '</tr>'
	     + '<tr>'
		 + '<td colspan="7" class="ds_head">' + t + '</td>'
		 + '</tr>'
		 + '<tr>';
}
 
function ds_template_day_row(t) {
	return '<td class="ds_subhead">' + t + '</td>';
	// Define width in CSS, XHTML 1.0 Strict doesn't have width property for it.
}
 
function ds_template_new_week() {
	return '</tr><tr>';
}
 
function ds_template_blank_cell(colspan) {
	return '<td colspan="' + colspan + '"></td>'
}
 
function ds_template_day(d, m, y) {
	return '<td class="ds_cell" onclick="ds_onclick(' + d + ',' + m + ',' + y + ')">' + d + '</td>';
	// Define width the day row.
}
 
function ds_template_main_below() {
	return '</tr>'
	     + '</table>';
}
 
// This one draws calendar...
function ds_draw_calendar(m, y) {
	// First clean the output buffer.
	ds_ob_clean();
	// Here we go, do the header
	ds_echo (ds_template_main_above(ds_monthnames[m - 1] + ' ' + y));
	for (i = 0; i < 7; i ++) {
		ds_echo (ds_template_day_row(ds_daynames[i]));
	}
	// Make a date object.
	var ds_dc_date = new Date();
	ds_dc_date.setMonth(m - 1);
	ds_dc_date.setFullYear(y);
	ds_dc_date.setDate(1);
	if (m == 1 || m == 3 || m == 5 || m == 7 || m == 8 || m == 10 || m == 12) {
		days = 31;
	} else if (m == 4 || m == 6 || m == 9 || m == 11) {
		days = 30;
	} else {
		days = (y % 4 == 0) ? 29 : 28;
	}
	var first_day = ds_dc_date.getDay();
	var first_loop = 1;
	// Start the first week
	ds_echo (ds_template_new_week());
	// If sunday is not the first day of the month, make a blank cell...
	if (first_day != 0) {
		ds_echo (ds_template_blank_cell(first_day));
	}
	var j = first_day;
	for (i = 0; i < days; i ++) {
		// Today is sunday, make a new week.
		// If this sunday is the first day of the month,
		// we've made a new row for you already.
		if (j == 0 && !first_loop) {
			// New week!!
			ds_echo (ds_template_new_week());
		}
		// Make a row of that day!
		ds_echo (ds_template_day(i + 1, m, y));
		// This is not first loop anymore...
		first_loop = 0;
		// What is the next day?
		j ++;
		j %= 7;
	}
	// Do the footer
	ds_echo (ds_template_main_below());
	// And let's display..
	ds_ob_flush();
	// Scroll it into view.
	ds_ce.scrollIntoView();
}
 
// A function to show the calendar.
// When user click on the date, it will set the content of t.
function ds_sh(t) {
	// Set the element to set...
	ds_element = t;
	// Make a new date, and set the current month and year.
	var ds_sh_date = new Date();
	ds_c_month = ds_sh_date.getMonth() + 1;
	ds_c_year = ds_sh_date.getFullYear();
	// Draw the calendar
	ds_draw_calendar(ds_c_month, ds_c_year);
	// To change the position properly, we must show it first.
	ds_ce.style.display = '';
		// Move the calendar container!
	the_left = ds_getleft(t);
	the_top = ds_gettop(t) + t.offsetHeight;
	ds_ce.style.left = the_left + 'px';
	ds_ce.style.top = the_top + 'px';
	// Scroll it into view.
	ds_ce.scrollIntoView();
 
}
 
// Hide the calendar.
function ds_hi() {
	ds_ce.style.display = 'none';
}
 
// Moves to the next month...
function ds_nm() {
	// Increase the current month.
	ds_c_month ++;
	// We have passed December, let's go to the next year.
	// Increase the current year, and set the current month to January.
	if (ds_c_month > 12) {
		ds_c_month = 1; 
		ds_c_year++;
	}
	// Redraw the calendar.
	ds_draw_calendar(ds_c_month, ds_c_year);
}
 
// Moves to the previous month...
function ds_pm() {
	ds_c_month = ds_c_month - 1; // Can't use dash-dash here, it will make the page invalid.
	// We have passed January, let's go back to the previous year.
	// Decrease the current year, and set the current month to December.
	if (ds_c_month < 1) {
		ds_c_month = 12; 
		ds_c_year = ds_c_year - 1; // Can't use dash-dash here, it will make the page invalid.
	}
	// Redraw the calendar.
	ds_draw_calendar(ds_c_month, ds_c_year);
}
 
// Moves to the next year...
function ds_ny() {
	// Increase the current year.
	ds_c_year++;
	// Redraw the calendar.
	ds_draw_calendar(ds_c_month, ds_c_year);
}
 
// Moves to the previous year...
function ds_py() {
	// Decrease the current year.
	ds_c_year = ds_c_year - 1; // Can't use dash-dash here, it will make the page invalid.
	// Redraw the calendar.
	ds_draw_calendar(ds_c_month, ds_c_year);
}
 
// Format the date to output.
function ds_format_date(d, m, y) {
	// 2 digits month.
	m2 = '00' + m;
	m2 = m2.substr(m2.length - 2);
	// 2 digits day.
	d2 = '00' + d;
	d2 = d2.substr(d2.length - 2);
	// YYYY-MM-DD
	return y + '-' + m2 + '-' + d2;
}
 
// When the user clicks the day.
function ds_onclick(d, m, y) {
	// Hide the calendar.
	ds_hi();
	// Set the value of it, if we can.
	if (typeof(ds_element.value) != 'undefined') {
		ds_element.value = ds_format_date(d, m, y);
	// Maybe we want to set the HTML in it.
	} else if (typeof(ds_element.innerHTML) != 'undefined') {
		ds_element.innerHTML = ds_format_date(d, m, y);
	// I don't know how should we display it, just alert it to user.
	} else {
		alert (ds_format_date(d, m, y));
	}
}
 
</script>
 
 
THE FORM
 
<form action="clubnights.php" method="post">
 
Change date to: <input onclick="ds_sh(this);" name="clubnightdate" readonly="readonly" style="cursor: text" size="20">
<div align="left"><input type="submit" name="submit" value="Find Events" /></div>
<input type="hidden" name="areaid" value="<?php echo $aid; ?>"  />
<input type="hidden" name="submitted" value="TRUE" />
 
 
</form>

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Question by:dm404
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11 Comments
 
LVL 14

Expert Comment

by:tomaugerdotcom
ID: 21747100
In the last function:
function ds_onclick(d, m, y) {
      // Hide the calendar.
      ds_hi();
      // Set the value of it, if we can.
      if (typeof(ds_element.value) != 'undefined') {
            ds_element.value = ds_format_date(d, m, y);
      // Maybe we want to set the HTML in it.
      } else if (typeof(ds_element.innerHTML) != 'undefined') {
            ds_element.innerHTML = ds_format_date(d, m, y);
      // I don't know how should we display it, just alert it to user.
      } else {
            alert (ds_format_date(d, m, y));
      }


   // we ADD THe FOLLOWING:
   document.getElementById("myFormID").submit();
}


just make sure that you give your form an id like this
<form id="myFormID" action="etc...." />
0
 

Author Comment

by:dm404
ID: 21754682
Hi tomaugerdotcom,

I tried your script but nothing happened? No change to the page at all.
0
 
LVL 14

Expert Comment

by:tomaugerdotcom
ID: 21754739
in that last function, can you try adding a debugging test line like this and tell me if you get the alert box?

In the last function:
function ds_onclick(d, m, y) {
      // Hide the calendar.
      ds_hi();
// ***** add the line below
alert ("got here: " + document.getElementById("myForm").tagName);


//-------------------

obviously, substituting "myForm" for the id of your form (make sure you've specified an ID, not just a name for your form tag)
0
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Author Comment

by:dm404
ID: 21754847
Hi tomaugerdotcom,

I did the

// ***** add the line below
alert ("got here: " + document.getElementById("myForm").tagName);

part. & it came up with the alert box.
0
 
LVL 14

Expert Comment

by:tomaugerdotcom
ID: 21754961
Cool and what did it say?
0
 

Author Comment

by:dm404
ID: 21755068
got here: FORM
0
 
LVL 14

Expert Comment

by:tomaugerdotcom
ID: 21755178
Sweet.
Can you copy and paste your entire <form> here for me?
0
 

Author Comment

by:dm404
ID: 21755300
<form action="clubnights.php" method="post" id="myForm">

Change date to: <input onclick="ds_sh(this);" name="clubnightdate" readonly="readonly" style="cursor: text" size="20">
<div align="left"><input type="submit" name="submit" value="Find Events" /></div>
<input type="hidden" name="areaid" value="<?php echo $aid; ?>"  />
<input type="hidden" name="submitted" value="TRUE" />


</form>
0
 
LVL 14

Accepted Solution

by:
tomaugerdotcom earned 500 total points
ID: 21755419
Well then in that case your clubnights.php should be getting the information.

The line that says document.getElementById("myForm").submit() will submit your form for you.

From that point it's up to your PHP script to read the clubnightdate value and do what it has to do.

If your PHP script is expecting the $_POST['submit'] value to be set, then use this in your javascript instead:
document.getElementById("myForm").submit.click();

Good luck!

T
0
 

Author Comment

by:dm404
ID: 21763116
Good news,

I removed the button from the form & hey presto it worked!

<form action="clubnights.php" method="post" id="myForm">

Change date to: <input onclick="ds_sh(this);" name="clubnightdate" readonly="readonly" style="cursor: text" size="20">

<input type="hidden" name="areaid" value="<?php echo $aid; ?>"  />
<input type="hidden" name="submitted" value="TRUE" />
0
 
LVL 14

Expert Comment

by:tomaugerdotcom
ID: 21763573
Good news. Can you let me know what you wished I had done better that you only gave me a "b" rating?

Thanks

T
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