/******************************************************************************************************** Valid month script Written by Mark Wilton-Jones, 6-7/10/2002 ******************************************************************************************************** Please see http://www.howtocreate.co.uk/jslibs/ for details and a demo of this script Please see http://www.howtocreate.co.uk/jslibs/termsOfUse.html for terms of use This script monitors years and months and makes sure that the correct number of days are provided. To use: Inbetween the tags, put: To have a static year box (only allows the years defined in the HTML) Day of month select box should be in the format: Month select box should be in the format: Year select box should be in the format: You can now use: setToday('day','month','year'); to set the date to today's date (after the page has loaded) To have an extendible year box (creates dates lower/higher than the current range) Year select box should be in the format: If you do not want to have higher / lower values, simply omit the relevant option Function format: checkMore( this, CURRENT LOWEST YEAR, CURRENT HIGHEST YEAR, LOWEST POSSIBLE YEAR, HIGHEST POSSIBLE YEAR ) You can now use: reFill( 'year', 1980, 2005, true, true );setToday('day','month','year'); to set the date to today's date (after the page has loaded) Function format (make sure the range of years includes the current year): reFill( name of year select box, LOWEST YEAR, HIGHEST YEAR, ALLOW HIGHER (true/false), ALLOW LOWER (true/false) ) _____________________________________________________________________________________________________________________*/ //Opera 7 has a bug making it fail to set selectedIndex after dynamic generation of options unless there is a 0ms+ delay //I have put fixes in in all necessary places function MWJ_findSelect( oName, oDoc ) { //get a reference to the select box using its name if( !oDoc ) { oDoc = window.document; } for( var x = 0; x < oDoc.forms.length; x++ ) { if( oDoc.forms[x][oName] ) { return oDoc.forms[x][oName]; } } for( var x = 0; document.layers && x < oDoc.layers.length; x++ ) { //scan layers ... var theOb = MWJ_findObj( oName, oDoc.layers[x].document ); if( theOb ) { return theOb; } } return null; } function dateChange( d, m, y ) { d = MWJ_findSelect( d ), m = MWJ_findSelect( m ), y = MWJ_findSelect( y ); //work out if it is a leap year var IsLeap = parseInt( y.options[y.selectedIndex].value ); IsLeap = !( IsLeap % 4 ) && ( ( IsLeap % 100 ) || !( IsLeap % 400 ) ); //find the number of days in that month IsLeap = [31,(IsLeap?29:28),31,30,31,30,31,31,30,31,30,31][m.selectedIndex]; //store the current day - reduce it if the new month does not have enough days var storedDate = ( d.selectedIndex > IsLeap - 1 ) ? ( IsLeap - 1 ) : d.selectedIndex; while( d.options.length ) { d.options[0] = null; } //empty days box then refill with correct number of days for( var x = 0; x < IsLeap; x++ ) { d.options[x] = new Option( x + 1, x + 1 ); } d.options[storedDate].selected = true; //select the number that was selected before if( window.opera && document.importNode ) { window.setTimeout('MWJ_findSelect( \''+d.name+'\' ).options['+storedDate+'].selected = true;',0); } } // REMOVED THE ADDING MORE YEARS FUNCTION (NOT USING IT) function reFill( y, oBot, oTop, oDown, oUp ) { y = MWJ_findSelect( y ); y.nowBot = oBot; y.nowTop = oTop; //empty and refill the select box using the range of numbers specified while( y.options.length ) { y.options[0] = null; } if( oDown ) { y.options[0] = new Option('Lower ...','MWJ_DOWN'); } for( var x = oBot; x <= oTop; x++ ) { y.options[y.options.length] = new Option(x,x); } if( oUp ) { y.options[y.options.length] = new Option('Higher ...','MWJ_UP'); } }