browserName        = navigator.appName  
browserVersion      = parseInt(navigator.appVersion)  

document.onmousedown = checkforRightMouseButtonClick;  
if (browserVersion<5 && browserName=="Netscape")  
{  
window.onmousedown = checkforRightMouseButtonClick;  
}  

function rightClickPressed()  
{  
alert("Tüm Haklari ALVIS TRAVEL'e Aittir.");  
}  
 
function checkforRightMouseButtonClick(mouseEvent)  
{  
if ( ((browserName=="Microsoft Internet Explorer") && (event.button >1)) ||  
((browserName=="Ne tscape") && (mouseEvent.which > 1)) )  
{  
rightClickPressed()  
return false;  
}  
else  
return true;  
}