function changeOpacity(elementId,elementOpacity,otherOpacity) {
	element = document.getElementById(elementId);
	
	if(!element) {
		alert('Coult not select element');
	} else {
		element.style.id = 'alpha(opacity='+elementOpacity+')';		
		
		allElements = new Array('div1_1','div1_2','div1_3','div1_4','div1_5','div1_6','div1_7','div1_8','div1_9','div1_10','div1_11','div1_12','div1_13','div1_14','div1_15');
		otherElements = new Array();
		counter = 0;
		for(i=0;i<allElements.length;i++) {
			if(allElements[i] != element.id) {
				otherElements[counter] = allElements[i]; 
				counter++;
			}
		}
		
		for(i2=0;i2<otherElements.length;i2++) {
			otherElement = document.getElementById(otherElements[i2]);
			if(otherElement) {
				otherElement.style.filter = 'alpha(opacity='+otherOpacity+')';		
			}
		}		
	}
}

function unChangeOpacity() {
	allElements = new Array('div1_1','div1_2','div1_3','div1_4','div1_5','div1_6','div1_7','div1_8','div1_9','div1_10','div1_11','div1_12','div1_13','div1_14','div1_15');
	for(i=0;i<allElements.length;i++) {
		element = document.getElementById(allElements[i]);
		if(element) {
			element.style.filter = 'alpha(opacity=100)';		
		} else {
			alert('no object');
		}
	
	}
}

function showImage(imageId){
	image = document.getElementById(imageId);
	if(image) {
		image.className = 'default_image_visible';		
	} else {
		alert('Could not select image'); 
	}
}

function hideImage(imageId){
	image = document.getElementById(imageId);
	if(image) {
		image.className = 'default_image_hidden';		
	} else {
		alert('Could not select image'); 
	}
}

function showtext(text) {
	switch(text) {
		case 'otwt':
			if(navigator.appName.indexOf('Microsoft')!=-1) {
				document.getElementById('otwt').style.display = 'block';
			}
			else {
				document.getElementById('otwt').style.display = 'table-row';
			}
			document.getElementById('go3').style.display = 'none';
			document.getElementById('contact').style.display = 'none';
			document.getElementById('messageboard').style.display = 'none';
		break;
		case 'go3':
			if(navigator.appName.indexOf('Microsoft')!=-1) {
				document.getElementById('go3').style.display = 'block';
			}
			else {
				document.getElementById('go3').style.display = 'table-row';
			}
			document.getElementById('otwt').style.display = 'none';
			document.getElementById('contact').style.display = 'none';
			document.getElementById('messageboard').style.display = 'none';
		break;
		case 'contact':
			if(navigator.appName.indexOf('Microsoft')!=-1) {
				document.getElementById('contact').style.display = 'block';
			}
			else {
				document.getElementById('contact').style.display = 'table-row';
			}
			document.getElementById('otwt').style.display = 'none';
			document.getElementById('go3').style.display = 'none';
			document.getElementById('messageboard').style.display = 'none';
		break;
		case 'messageboard':
			if(navigator.appName.indexOf('Microsoft')!=-1) {
				document.getElementById('messageboard').style.display = 'block';
			}
			else {
				document.getElementById('messageboard').style.display = 'table-row';
			}
			document.getElementById('otwt').style.display = 'none';
			document.getElementById('go3').style.display = 'none';
			document.getElementById('contact').style.display = 'none';
		break;
	}
}