function call_cat() { 
  var emage_cat= document.getElementById('cat').src;
 if (!emage_cat.indexOf("images/homepage/bsl-categories_on.png"))
 {
 	//alert("True");
 }
 else
 {
 	document.getElementById('cat').src = "images/homepage/bsl-categories_on.png";
	document.getElementById('prod').src = "images/homepage/bsl-products_off.png";
	document.getElementById('cust').src = "images/homepage/bsl-customers_off.png";
	document.getElementById('exprs').src = "images/homepage/bsl-expressservice_off.png";
	document.getElementById('tercon').src = "images/homepage/bsl-termsconditions_off.png";
	document.getElementById('quareq').src = "images/homepage/bsl-qualityrequirements_off.png"
	
	document.getElementById('categories').style.display = "block";
	document.getElementById('products').style.display ="none";
	document.getElementById('customers').style.display = "none";
	document.getElementById('expressservice').style.display = "none";
	document.getElementById('qualityrequirements').style.display = "none";
	document.getElementById('termsconditions').style.display = "none";
 }
}
 
function call_prod() {
	var emage_prod= document.getElementById('prod').src;
	if (!emage_prod.indexOf("images/homepage/bsl-products_on.png"))
	{
		//alert("True");
		//document.getElementById('prod').src = "images/bsl_menu_products_on.jpg";
	}
	else
	{
		document.getElementById('prod').src = "images/homepage/bsl-products_on.png";
		document.getElementById('cat').src = "images/homepage/bsl-categories_off.png";
		document.getElementById('cust').src = "images/homepage/bsl-customers_off.png";
	    document.getElementById('exprs').src = "images/homepage/bsl-expressservice_off.png";
		document.getElementById('tercon').src = "images/homepage/bsl-termsconditions_off.png";
		document.getElementById('quareq').src = "images/homepage/bsl-qualityrequirements_off.png"
		
		document.getElementById('categories').style.display = "none";
		document.getElementById('products').style.display = "block";
		document.getElementById('customers').style.display = "none";
		document.getElementById('expressservice').style.display = "none";
		document.getElementById('qualityrequirements').style.display = "none";
		document.getElementById('termsconditions').style.display = "none";
	}
}
function call_cust() {
	var emage_cust= document.getElementById('cust').src;
	if (!emage_cust.indexOf("images/homepage/bsl-customers_on.png"))
	{
		//alert("True");
		
	}
	else
	{
		document.getElementById('cust').src = "images/homepage/bsl-customers_on.png";
		document.getElementById('cat').src = "images/homepage/bsl-categories_off.png";
		document.getElementById('prod').src = "images/homepage/bsl-products_off.png";
			    document.getElementById('exprs').src = "images/homepage/bsl-expressservice_off.png";
				document.getElementById('tercon').src = "images/homepage/bsl-termsconditions_off.png";
				document.getElementById('quareq').src = "images/homepage/bsl-qualityrequirements_off.png"
		
		document.getElementById('categories').style.display = "none";
		document.getElementById('products').style.display = "none";
		document.getElementById('customers').style.display = "block";
		document.getElementById('expressservice').style.display = "none";
		document.getElementById('qualityrequirements').style.display = "none";
		document.getElementById('termsconditions').style.display = "none";
		
	}
}
function call_exprs() {
	var emage_exprs= document.getElementById('exprs').src;
	if (!emage_exprs.indexOf("images/homepage/bsl-expresservice_on.png"))
	{
		//alert("True");
		
	}
	else
	{    
	    document.getElementById('exprs').src = "images/homepage/bsl-expressservice_on.png";
		document.getElementById('cust').src = "images/homepage/bsl-customers_off.png";
		document.getElementById('cat').src = "images/homepage/bsl-categories_off.png";
		document.getElementById('prod').src = "images/homepage/bsl-products_off.png";
		document.getElementById('tercon').src = "images/homepage/bsl-termsconditions_off.png";
		document.getElementById('quareq').src = "images/homepage/bsl-qualityrequirements_off.png"
		
		document.getElementById('categories').style.display = "none";
		document.getElementById('products').style.display = "none";
		document.getElementById('customers').style.display = "none";
		document.getElementById('expressservice').style.display = "block";
		document.getElementById('qualityrequirements').style.display = "none";
		document.getElementById('termsconditions').style.display = "none";
		
	}
}
function call_quareq() {
	var emage_quareq=document.getElementById('quareq').src;
	if (!emage_quareq.indexOf("images/homepage/bsl-qualityrequirements_on.png"))
	{
		//alert("True");
		
	}
	else
	{
		
		document.getElementById('quareq').src = "images/homepage/bsl-qualityrequirements_on.png";
		document.getElementById('cust').src = "images/homepage/bsl-customers_off.png";
		document.getElementById('cat').src = "images/homepage/bsl-categories_off.png";
		document.getElementById('prod').src = "images/homepage/bsl-products_off.png";
		document.getElementById('exprs').src = "images/homepage/bsl-expressservice_off.png";
				document.getElementById('tercon').src = "images/homepage/bsl-termsconditions_off.png";
					
		
		document.getElementById('categories').style.display = "none";
		document.getElementById('products').style.display = "none";
		document.getElementById('customers').style.display = "none";
		document.getElementById('qualityrequirements').style.display = "block";
		document.getElementById('expressservice').style.display = "none";
		document.getElementById('termsconditions').style.display = "none";
		
	}
}
function call_tercon() {
	var emage_tercon=document.getElementById('tercon').src;
	if (!emage_tercon.indexOf("images/homepage/bsl-termsconditions_on.png"))
	{
		//alert("True");
		
	}
	else
	{
		document.getElementById('tercon').src = "images/homepage/bsl-termsconditions_on.png";
		document.getElementById('cust').src = "images/homepage/bsl-customers_off.png";
		document.getElementById('cat').src = "images/homepage/bsl-categories_off.png";
		document.getElementById('prod').src = "images/homepage/bsl-products_off.png";
		document.getElementById('exprs').src = "images/homepage/bsl-expressservice_off.png";
		document.getElementById('quareq').src = "images/homepage/bsl-qualityrequirements_off.png";
		
		document.getElementById('categories').style.display = "none";
		document.getElementById('products').style.display = "none";
		document.getElementById('customers').style.display = "none";
				document.getElementById('termsconditions').style.display = "block";
				document.getElementById('expressservice').style.display = "none";
				document.getElementById('qualityrequirements').style.display = "none";
		
	}
}
function call_bslhist() { 
  var emage_bslhist=document.getElementById('bslhist').src;
 if (!emage_bslhist.indexOf("images/homepage/bsl-bslhistory_on.png"))
 {
 	//alert("True");
 }
 else{document.getElementById('bslhist').src = "images/homepage/bsl-bslhistory_on.png";
      document.getElementById('article').src = "images/homepage/bsl-articles_off.png";
	  document.getElementById('abtus').src = "images/homepage/bsl-aboutus_off.png";
	  
	  document.getElementById('bslhistory').style.display = "block";
	  document.getElementById('articles').style.display = "none";
	  document.getElementById('aboutus').style.display = "none";
	  
	  
	 }
 }
 function call_article() { 
  var emage_article=document.getElementById('article').src;
 if (!emage_article.indexOf("images/homepage/bsl-articles_on.png"))
 {
 	//alert("True");
 }
 else{document.getElementById('bslhist').src = "images/homepage/bsl-bslhistory_off.png";
      document.getElementById('article').src = "images/homepage/bsl-articles_on.png";
	  document.getElementById('abtus').src = "images/homepage/bsl-aboutus_off.png";
	  
	  document.getElementById('bslhistory').style.display = "none";
	  document.getElementById('articles').style.display = "block";
	  document.getElementById('aboutus').style.display = "none";
	  
	  
	 }}
 
 function call_abtus() { 
  var emage_abtus=document.getElementById('abtus').src;
 if (!emage_abtus.indexOf("images/homepage/bsl-aboutus_on.png"))
 {
 	//alert("True");
 }
 else{document.getElementById('bslhist').src = "images/homepage/bsl-bslhistory_off.png";
      document.getElementById('article').src = "images/homepage/bsl-articles_off.png";
	  document.getElementById('abtus').src = "images/homepage/bsl-aboutus_on.png";
	  
	  document.getElementById('bslhistory').style.display = "none";
	  document.getElementById('articles').style.display = "none";
	  document.getElementById('aboutus').style.display = "block";
	  
	  
	 }
 }
// JavaScript Document