timeBetweenTime

gistfile1.js

	get_h: function(timeString) {
			var seperator = timeString.indexOf(":");
			return this.timeTrim(timeString.substring(0,seperator));
		},
		
	  get_m: function(timeString) {
				var seperator = timeString.indexOf(":");
				var timeMinusHour = timeString.substring(seperator);
				var theWhiteSpace = timeMinusHour.indexOf(" ");
				return this.timeTrim(timeMinusHour.substring(1,theWhiteSpace));
		},
		
		get_am_pm: function(timeString) {
				var theWhiteSpace = timeString.indexOf(" ");
				var time = this.timeTrim(timeString.substring(theWhiteSpace));
				if(time == "am") {
					return 0
				}
				return 1;
		},
		
		timeTrim: function(timeString) {
			var	timeString = timeString.replace(/^\s\s*/, ''),
				ws = /\s/,
				i = timeString.length;
			while (ws.test(timeString.charAt(--i)));
			return timeString.slice(0, i + 1);
		},
		
	  timeBetweenTimes: function(startime, endtime) {
			//set up params
			h1 = parseFloat(this.get_h(startime),10);
			m1 = parseFloat(this.get_m(startime),10);
			h2 = parseFloat(this.get_h(endtime),10);
			m2 = parseFloat(this.get_m(endtime),10);
			console.log(h1,m1,h2,m2);
			var er3a = parseFloat(this.get_am_pm(startime));
			var er3b = parseFloat(this.get_am_pm(endtime));
			
			
			if ((er3a==0) && (h1==12)) {h1=0}

			if ((er3a==0) && (er3b==1)) {
			t1= (60*h1) + m1;
			t2= ((h2+12) * 60) + m2;
			t3= t2-t1;
			t4= Math.floor(t3/60)
			t5= t3-(t4*60)
			}
			else if ((er3a==1) && (er3b==0)) {
			if (h2==12) {h2=0}
			if (h1==12) {h1=0}
			t1= (60*h1) + m1;
			t2= ((h2+12) * 60) + m2;
			t3= t2-t1;
			t4= Math.floor(t3/60)
			t5= t3-(t4*60)
			}
			else if ((er3a==0) && (er3b==0)) {
			t1= (h1*60) + m1;
			t2= (h2*60) + m2;
				if (t2>t1) {
				t3= t2-t1;
				t4= Math.floor(t3/60)
				t5= t3-(t4*60)
				}
				else {
				t2= ((h2+24)*60) + m2;
				t3= t2-t1;
				t4= Math.floor(t3/60)
				t5= t3-(t4*60)
				}
			}
			else if ((er3a==1) && (er3b==1)) {
				if (h1!=12) {h1=h1+12}
				if (h2!=12) {h2=h2+12}
				t1= (h1*60) + m1;
				t2= (h2*60) + m2;
				if (t2>t1) {
				t3= t2-t1;
				t4= Math.floor(t3/60)
				t5= t3-(t4*60)
				}
				else {
				t2= ((h2+24)*60) + m2;
				t3= t2-t1;
				t4= Math.floor(t3/60)
				t5= t3-(t4*60)
				}
				}


		   return "  " + t4  + " hrs" + " " + t5 + " mins";
		}