fix-admpanel-previewdate.js

// 07.01.2013 - mt: fix admin panel preview date
$(function(){
  if( $('#TSFE_ADMIN_PANEL_FORM').length != 1 ){
		return;
	}


	document.getElementById('TSFE_ADMIN_PANEL_FORM').onsubmit = function(){
		document.forms.TSFE_ADMIN_PANEL_FORM['TSFE_ADMIN_PANEL[DUMMY]'].value=Math.random().toString().substring(2,8)
		var ts = Math.abs(document.forms.TSFE_ADMIN_PANEL_FORM['TSFE_ADMIN_PANEL[preview_simulateDate]'].value);
		ts += new Date( ts * 1000 ).getTimezoneOffset() * 60;
		// if simulatedate-field is emptied a negative value might be saved in be_user's uc field, T3-core chokes badly on this
		if(ts < 0){
			ts = 0;
		}
		document.forms.TSFE_ADMIN_PANEL_FORM['TSFE_ADMIN_PANEL[preview_simulateDate]'].value = ts;
	}

	var correctDate = new Date(parseInt(document.forms.TSFE_ADMIN_PANEL_FORM['TSFE_ADMIN_PANEL[preview_simulateDate]'].value,10)  * 1000),
	leadingZero = function( n ){ return n < 10?'0'+n:n;	}

	document.forms.TSFE_ADMIN_PANEL_FORM['TSFE_ADMIN_PANEL[preview_simulateDate]_hr'].value = [
		leadingZero(correctDate.getHours()),
		':',
		leadingZero(correctDate.getMinutes()),
		' ',
		correctDate.getDate(),
		'-',
		(correctDate.getMonth()+ 1),
		'-',
		(correctDate.getFullYear())
	].join('');

	document.forms.TSFE_ADMIN_PANEL_FORM['TSFE_ADMIN_PANEL[preview_simulateDate]'].value = ( +correctDate / 1000 ) + correctDate.getTimezoneOffset() * -60;
});