// function to change tab section display.
// variable is the id of the div containing the section to be viewed

function changeTabSection (section) {
	if (section == "MainTab1") {
	    	document.getElementById("MainTab1").style.display = "block";
	    	document.getElementById("MainTab2").style.display = "none";
		if (document.getElementById('MainTab3')) {
			document.getElementById("MainTab3").style.display = "none";
		}
		if (document.getElementById('MainTab4')) {
			document.getElementById("MainTab4").style.display = "none";
		}
		if (document.getElementById('MainTab5')) {
			document.getElementById("MainTab5").style.display = "none";
		}
	    	document.getElementById("MainTab1Link").className = "active";
	    	document.getElementById("MainTab2Link").className = "inactive";
		if (document.getElementById('MainTab3Link')) {
			document.getElementById("MainTab3Link").className = "inactive";
		}
		if (document.getElementById('MainTab4Link')) {
			document.getElementById("MainTab4Link").className = "inactive";
		}
		if (document.getElementById('MainTab5Link')) {
			document.getElementById("MainTab5Link").className = "inactive";
		}
   	}
   	else if (section == "MainTab2") {
	    	document.getElementById("MainTab1").style.display = "none";
	    	document.getElementById("MainTab2").style.display = "block";
		if (document.getElementById('MainTab3')) {
			document.getElementById("MainTab3").style.display = "none";
		}
		if (document.getElementById('MainTab4')) {
			document.getElementById("MainTab4").style.display = "none";
		}
		if (document.getElementById('MainTab5')) {
			document.getElementById("MainTab5").style.display = "none";
		}
	    	document.getElementById("MainTab1Link").className = "inactive";
	    	document.getElementById("MainTab2Link").className = "active";
		if (document.getElementById('MainTab3Link')) {
			document.getElementById("MainTab3Link").className = "inactive";
		}
		if (document.getElementById('MainTab4Link')) {
			document.getElementById("MainTab4Link").className = "inactive";
		}
		if (document.getElementById('MainTab5Link')) {
			document.getElementById("MainTab5Link").className = "inactive";
		}
   	}
   	else if (section == "MainTab3") {
	    	document.getElementById("MainTab1").style.display = "none";
	    	document.getElementById("MainTab2").style.display = "none";
		if (document.getElementById('MainTab3')) {
			document.getElementById("MainTab3").style.display = "block";
		}
		if (document.getElementById('MainTab4')) {
			document.getElementById("MainTab4").style.display = "none";
		}
		if (document.getElementById('MainTab5')) {
			document.getElementById("MainTab5").style.display = "none";
		}
	    	document.getElementById("MainTab1Link").className = "inactive";
	    	document.getElementById("MainTab2Link").className = "inactive";
		if (document.getElementById('MainTab3Link')) {
			document.getElementById("MainTab3Link").className = "active";
		}
		if (document.getElementById('MainTab4Link')) {
			document.getElementById("MainTab4Link").className = "inactive";
		}
		if (document.getElementById('MainTab5Link')) {
			document.getElementById("MainTab5Link").className = "inactive";
		}
   	}
   	else if (section == "MainTab4") {
	    	document.getElementById("MainTab1").style.display = "none";
	    	document.getElementById("MainTab2").style.display = "none";
		if (document.getElementById('MainTab3')) {
			document.getElementById("MainTab3").style.display = "none";
		}
		if (document.getElementById('MainTab4')) {
			document.getElementById("MainTab4").style.display = "block";
		}
		if (document.getElementById('MainTab5')) {
			document.getElementById("MainTab5").style.display = "none";
		}
	    	document.getElementById("MainTab1Link").className = "inactive";
	    	document.getElementById("MainTab2Link").className = "inactive";
		if (document.getElementById('MainTab3Link')) {
			document.getElementById("MainTab3Link").className = "inactive";
		}
		if (document.getElementById('MainTab4Link')) {
			document.getElementById("MainTab4Link").className = "active";
		}
		if (document.getElementById('MainTab5Link')) {
			document.getElementById("MainTab5Link").className = "inactive";
		}
   	}
   	else if (section == "MainTab5") {
	    	document.getElementById("MainTab1").style.display = "none";
	    	document.getElementById("MainTab2").style.display = "none";
		if (document.getElementById('MainTab3')) {
			document.getElementById("MainTab3").style.display = "none";
		}
		if (document.getElementById('MainTab4')) {
			document.getElementById("MainTab4").style.display = "none";
		}
		if (document.getElementById('MainTab5')) {
			document.getElementById("MainTab5").style.display = "block";
		}
	    	document.getElementById("MainTab1Link").className = "inactive";
	    	document.getElementById("MainTab2Link").className = "inactive";
		if (document.getElementById('MainTab3Link')) {
			document.getElementById("MainTab3Link").className = "inactive";
		}
		if (document.getElementById('MainTab4Link')) {
			document.getElementById("MainTab4Link").className = "inactive";
		}
		if (document.getElementById('MainTab5Link')) {
			document.getElementById("MainTab5Link").className = "active";
		}
   	}
   	else {
	    	document.getElementById("MainTab1").style.display = "block";
	    	document.getElementById("MainTab2").style.display = "none";
		if (document.getElementById('MainTab3')) {
			document.getElementById("MainTab3").style.display = "none";
		}
		if (document.getElementById('MainTab4')) {
			document.getElementById("MainTab4").style.display = "none";
		}
		if (document.getElementById('MainTab5')) {
			document.getElementById("MainTab5").style.display = "none";
		}
	    	document.getElementById("MainTab1Link").className = "active";
	    	document.getElementById("MainTab2Link").className = "inactive";
		if (document.getElementById('MainTab3Link')) {
			document.getElementById("MainTab3Link").className = "inactive";
		}
		if (document.getElementById('MainTab4Link')) {
			document.getElementById("MainTab4Link").className = "inactive";
		}
		if (document.getElementById('MainTab5Link')) {
			document.getElementById("MainTab5Link").className = "inactive";
		}
   	}
}