function switchit(list){ 
		var listElementStyle=document.getElementById(list).style; 
		var one = document.getElementById('1st').style; 
		var two = document.getElementById('2nd').style; 
		var three = document.getElementById('3rd').style; 
		var four = document.getElementById('4th').style; 

		if (list=="1st") { 
			two.display="none"; 
			three.display="none"; 
			four.display="none";
		} else if (list=="2nd") {
			one.display="none";
			three.display="none";
			four.display="none";
		} else if (list=="3rd") { 
			one.display="none"; 
			two.display="none"; 
			four.display="none";
		} else if (list=="4th") {
			one.display="none"; 
			two.display="none";
			three.display="none";		
		}	
		listElementStyle.display="block"; 
		};

function getURL () {
	var url = window.location.href;
	var a = document.getElementById('nav_a');
	var b = document.getElementById('nav_b');
	var c = document.getElementById('nav_c');
	var d = document.getElementById('nav_d');
	var one = document.getElementById('1st').style; 
	var two = document.getElementById('2nd').style; 
	var three = document.getElementById('3rd').style; 
	var four = document.getElementById('4th').style;
	
	if (url == "http://sinusaero.com/sinusitis_what-is-sinusitis.html" || url=="http://www.sinusaero.com/sinusitis_what-is-sinusitis.html") {
		a.style.backgroundImage = "url(images/sinusitisBlue.jpg)";
		a.style.backgroundRepeat = "no-repeat";
		document.getElementById('1_1').style.textDecoration = "underline";
		one.display = "block";
	} 
	else if (url == "http://sinusaero.com/sinusitis_signs-symptoms.html" || url=="http://www.sinusaero.com/sinusitis_signs-symptoms.html") {
		a.style.backgroundImage = "url(images/sinusitisBlue.jpg)";
		a.style.backgroundRepeat = "no-repeat";
		document.getElementById('1_2').style.textDecoration = "underline";
		one.display = "block";
	}
	else if (url == "http://sinusaero.com/sinusitis_treatment.html" || url=="http://www.sinusaero.com/sinusitis_treatment.html") {
		a.style.backgroundImage = "url(images/sinusitisBlue.jpg)";
		a.style.backgroundRepeat = "no-repeat";
		document.getElementById('1_3').style.textDecoration = "underline";
		one.display = "block";
	}
	else if (url == "http://sinusaero.com/sinusitis_surgery.html" || url=="http://www.sinusaero.com/sinusitis_surgery.html") {
		a.style.backgroundImage = "url(images/sinusitisBlue.jpg)";
		a.style.backgroundRepeat = "no-repeat";
		document.getElementById('1_4').style.textDecoration = "underline";
		one.display = "block";		
	}	
	else if (url == "http://sinusaero.com/sinusitis_children.html" || url=="http://www.sinusaero.com/sinusitis_children.html") {
		a.style.backgroundImage = "url(images/sinusitisBlue.jpg)";
		a.style.backgroundRepeat = "no-repeat";
		document.getElementById('1_5').style.textDecoration = "underline";
		one.display = "block";		
	}
	else if (url == "http://sinusaero.com/benefits_instant-comfort.html" || url=="http://www.sinusaero.com/benefits_instant-comfort.html") {
		b.style.backgroundImage = "url(images/solutionBlue.jpg)";
		b.style.backgroundRepeat = "no-repeat"; 
		two.display = "block";
	}
	else if (url == "http://sinusaero.com/" || url=="http://www.sinusaero.com/" || url=="http://sinusaero.com/index.html" || url=="http://www.sinusaero.com/index.html") {
		b.style.backgroundImage = "url(images/solutionBlue.jpg)";
		b.style.backgroundRepeat = "no-repeat"; 
		two.display = "block";		
		document.getElementById('2_1').style.textDecoration = "underline";	
	}
	else if (url == "http://sinusaero.com/about_us.html" || url=="http://www.sinusaero.com/about_us.html") {
		b.style.backgroundImage = "url(images/solutionBlue.jpg)";		
		b.style.backgroundRepeat = "no-repeat"; 
		two.display = "block";	
		document.getElementById('2_2').style.textDecoration = "underline";		
			
	}
	else if (url == "http://sinusdynamics.com/patient_services.html" || url=="http://www.sinusaero.com/patient_services.html") {
		b.style.backgroundImage = "url(images/solutionBlue.jpg)";
		b.style.backgroundRepeat = "no-repeat"; 
		document.getElementById('2_3').style.textDecoration = "underline";
		two.display = "block";			
	}
	else if (url == "http://sinusaero.com/news.html" || url=="http://www.sinusaero.com/news.html") {
		b.style.backgroundImage = "url(images/solutionBlue.jpg)";
		b.style.backgroundRepeat = "no-repeat"; 
		document.getElementById('2_3').style.textDecoration = "underline";
		two.display = "block";
	}
	else if (url == "http://sinusaero.com/contact_us.html" || url=="http://www.sinusaero.com/contact_us.html") {
		b.style.backgroundImage = "url(images/solutionBlue.jpg)";
		b.style.backgroundRepeat = "no-repeat"; 
		document.getElementById('2_4').style.textDecoration = "underline";
		two.display = "block";
	}
	else if (url == "http://sinusaero.com/request_brochure.html" || url=="http://www.sinusaero.com/request_brochure.html") {
		b.style.backgroundImage = "url(images/solutionBlue.jpg)";
		b.style.backgroundRepeat = "no-repeat"; 
		document.getElementById('2_5').style.textDecoration = "underline";
		two.display = "block";		
	}
	else if (url == "http://sinusaero.com/survey.html" || url=="http://www.sinusaero.com/survey.html") {
		b.style.backgroundImage = "url(images/solutionBlue.jpg)";
		b.style.backgroundRepeat = "no-repeat"; 
		document.getElementById('2_6').style.textDecoration = "underline";
		two.display = "block";	
	}
	else if (url == "http://sinusaero.com/sitemap.html" || url=="http://www.sinusaero.com/sitemap.html") {
		b.style.backgroundImage = "url(images/solutionBlue.jpg)";
		b.style.backgroundRepeat = "no-repeat"; 
		document.getElementById('2_7').style.textDecoration = "underline";
		two.display = "block";	
	}
	else if (url == "http://sinusaero.com/physician_program.html" || url=="http://www.sinusaero.com/physician_program.html") {
		c.style.backgroundImage = "url(images/physicianBlue.jpg)";
		c.style.backgroundRepeat = "no-repeat"; 
		document.getElementById('3_1').style.textDecoration = "underline";
		three.display = "block";			
	}
	else if (url == "http://sinusaero.com/physician_process.html" || url=="http://www.sinusaero.com/physician_process.html") {
		c.style.backgroundImage = "url(images/physicianBlue.jpg)";
		c.style.backgroundRepeat = "no-repeat"; 
		document.getElementById('3_2').style.textDecoration = "underline";
		three.display = "block";				
	}
	else if (url == "http://sinusaero.com/physician_questions.html" || url=="http://www.sinusaero.com/physician_questions.html") {
		alert ('broken');
		c.style.backgroundImage = "url(images/physicianBlue.jpg)";
		c.style.backgroundRepeat = "no-repeat"; 
		document.getElementById('3_3').style.textDecoration = "underline";
		three.display = "block";				
	}
	else if (url == "http://www.sinusaero.com/physician_device-info.html" || url=="http://www.sinusaero.com/physician_device-info.html") {
		c.style.backgroundImage = "url(images/physicianBlue.jpg)";
		c.style.backgroundRepeat = "no-repeat"; 
		document.getElementById('3_4').style.textDecoration = "underline";
		three.display = "block";				
	}
	else if (url == "http://sinusaero.com/physician_research-studies.html" || url=="http://www.sinusaero.com/physician_research-studies.html" || url=="http://sinusaero.com/physician_research-studies2.html" || url=="http://www.sinusaero.com/physician_research-studies2.html" || url=="http://sinusaero.com/physician_research-studies3.html" || url=="http://www.sinusaero.com/physician_research-studies3.html" || url=="http://sinusaero.com/effectiveness-of-topical-antibiotics.html" || url=="http://www.sinusaero.com/effectiveness-of-topical-antibiotics.html" || url=="http://sinusaero.com/physician_research-studies5.html" || url=="http://www.sinusaero.com/physician_research-studies5.html" || url=="http://sinusaero.com/physician_research-studies4.html" || url=="http://www.sinusaero.com/physician_research-studies4.html") {
		c.style.backgroundImage = "url(images/physicianBlue.jpg)";
		c.style.backgroundRepeat = "no-repeat"; 
		document.getElementById('3_5').style.textDecoration = "underline";
		three.display = "block";				 
	} 
	else if (url =="http://sinusaero.com/aerosolized_medication.html" || url=="http://www.sinusaero.com/aerosolized_medication.html") {
		d.style.background = "transparent url(images/nav-bg2.png) -0px -36px no-repeat";
 		document.getElementById('4_1').style.textDecoration = "underline";
		four.display = "block";
	}
	else if (url =="http://sinusaero.com/medicated_irrigation.html" || url=="http://www.sinusaero.com/medicated_irrigation.html") {
		d.style.background = "transparent url(images/nav-bg2.png) -0px -36px no-repeat";
 		document.getElementById('4_2').style.textDecoration = "underline";
		four.display = "block";
	}
	else if (url =="http://sinusaero.com/sinus-treatments.html" || url=="http://www.sinusaero.com/sinus-treatments.html") {
		d.style.background = "transparent url(images/nav-bg2.png) -0px -36px no-repeat";
 		four.display = "block";
	}
}