var clickmessage="Sorry, you don't have permission to right-click."

function protectImages () {
if (document.all)
document.oncontextmenu=disableclick
else if (document.getElementById)
document.oncontextmenu=disableclick
else if (document.layers)
associateimages()
}

function disableclick(e) {
if (document.all) {
if (event.srcElement.tagName=="IMG"){
return false;
}
}
else if (document.layers) {
if (e.which == 3) {
return false;
}
}
else if (document.getElementById){
if (e.target.tagName=="IMG"){
return false
}
}
}

function associateimages(){
for(i=0;i<document.images.length;i++)
document.images[i].onmousedown=disableclick;
}