function displayServiceDiv(serviceId, navId) {

	var elements = document.getElementsByTagName('div');
	
	for (i=0; i<elements.length; i++){

    	if (elements[i].className== 'service') {
    	
  			elements[i].style.display='none'
      	
      	}
    }


	var navElements = document.getElementsByTagName('a');
	
	for (i=0; i<navElements.length; i++){

    	if (navElements[i].className== 'service-nav') {
    	
  			navElements[i].style.textDecoration = 'none'

      	}
    }	
	
	
	var underlineElement = document.getElementById(navId)
	
	underlineElement.style.textDecoration = 'underline'
	

	var showElement = document.getElementById(serviceId);

	//if (showElement.style.display=='none') {
		showElement.style.display = 'block'
	//}

	var homeElement = document.getElementById('home-content-commtech')
	homeElement.style.display = 'none'

}