Simple and quick Javascript parse date and format date functions

date_utils.js

		function getInt(a){
			a=parseInt(a);
			a=isNaN(a)?0:a;
			return a;
		}
		function getFloat(a){
			a=parseFloat(a);
			a=isNaN(a)?0:a;
			return a;
		}

		//parse_date('2015-04-29 10:29:08','YYYY-MM-DD HH:mm:ss');
		function parse_date(str_date,format){
			//var date = '2015-04-29 10:29:08';//'YYYY-MM-DD HH:mm:ss'
			//var d=new Date(Date.parse(date.replace(/-/g, '/')));
			var ms=['Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec'];
			var d=new Date();
			str_date=str_date.replace(/ /g,'-');
			str_date=str_date.replace(/:/g,'-');
			str_date=str_date.replace(/\//g,'-');
			format=format.replace(/ /g,'-');
			format=format.replace(/:/g,'-');
			format=format.replace(/\//g,'-');
			var a_date=str_date.split('-');
			var a_format=format.split('-');
			for(var i=0;i<a_date.length;i++){
				switch(a_format[i]){
					case 'YYYY':
						if(a_date[i].length===4){
							d.setYear(getInt(a_date[i]));
						}
					break;
					case 'MMM':
						if(a_date[i].length===3){
							d.setMonth(ms.indexOf(a_date[i]));
						}
					break;
					case 'MM':
						if(a_date[i].length===2){
							d.setMonth(getInt(a_date[i])-1);
						}
					break;
					case 'DD':case 'dd':
						if(a_date[i].length===2){
							d.setDate(getInt(a_date[i]));
						}
					break;
					case 'HH':case 'hh':
						if(a_date[i].length===2){
							d.setHours(getInt(a_date[i]));
						}
					break;
					case 'mm':
						if(a_date[i].length===2){
							d.setMinutes(getInt(a_date[i]));
						}
					break;
					case 'SS':case 'ss':
						if(a_date[i].length===2){
							d.setSeconds(getInt(a_date[i]));
						}
					break;
				}
			}
			if(a_format.indexOf('AM')>-1 && d.getHours()>=12){
				d.setHours(d.getHours()-12);
			}
			if(a_format.indexOf('PM')>-1 && (d.getHours()/12)<1){
				d.setHours(d.getHours()+12);
			}
			return d;
		}
		//format_date(new Date(),'DD-MMM-YYYY hh:mm A');
		function format_date(date,format){
			//'DD-MMM-YYYY HH:mm';
			var Y=date.getFullYear(),m=date.getMonth()+1,d=date.getDate();
			var H=date.getHours(),i=date.getMinutes(),S=date.getSeconds();
			var ms=['Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec'];
			var s=format;
			var h = H % 12;
				h = h>0 ? h : 12;
			s=s.replace('YYYY',Y);
			s=s.replace('MMM',ms[m-1]);
			s=s.replace('MM','00'.substr(0,2-(m+'').length)+ m);
			s=s.replace('DD','00'.substr(0,2-(d+'').length)+ d);
			s=s.replace('HH','00'.substr(0,2-(H+'').length)+ H);
			s=s.replace('hh','00'.substr(0,2-(h+'').length)+ h);
			s=s.replace('mm','00'.substr(0,2-(i+'').length)+ i);
			s=s.replace('SS','00'.substr(0,2-(S+'').length)+ S);
			s=s.replace('ss','00'.substr(0,2-(S+'').length)+ S);
			s=s.replace('A',H >= 12 ? 'PM' : 'AM');
			
			return s;
		}