function bodyrclickIE() {
	if (navigator.appName == 'Microsoft Internet Explorer' && (event.button == 2 || event.button == 3)) {
		//alert('Welcome');
		//return false;
	}
}
function bodyrclickNS(e) {
	if ((document.layers||document.getElementById&&!document.all) && (e.which==2||e.which==3)) {
		//alert('Welcome');
		return false;
	}
}
function blockbodyrclick() {
	if (document.layers) {
		document.captureEvents(Event.MOUSEDOWN);
		document.onmousedown=bodyrclickNS;
	}
	else if (document.all&&!document.getElementById) {
		document.onmousedown=bodyrclickIE;
	}
	//document.oncontextmenu=new Function("alert('Welcome');return false")
	document.oncontextmenu=new Function("return false")
}





<!-- This script and many more are available free online at -->
<!-- The JavaScript Source!! http://javascript.internet.com -->
function imgrclick(e) {
	var msg = "Welcome";
	if (navigator.appName == 'Netscape' && e.which == 3) {
		//window.location.reload( false );
		alert(msg);
		return false;
	}
	if (navigator.appName == 'Microsoft Internet Explorer' && event.button==2) {
		//window.location.reload( false );
		alert(msg);
		return false;
	}
	else return true;
}
function blockimgrclick() {
	if(document.images) {
		for(i=0;i<document.images.length;i++) {
			document.images[i].onmousedown = imgrclick;
			document.images[i].onmouseup = imgrclick;
		}
	}
}





/** This is high-level function; REPLACE IT WITH YOUR CODE.
* It must react to delta being more/less than zero.
*/
function mwheelhandle(delta) {
	if (delta < 0) { // wheel down
		/* something. */;
	} else { // wheel up
		/* something. */;
	}
}
/** Event handler for mouse wheel event.
 */
function mwheel(event) {
    var delta = 0;
    if (!event) /* For IE. */ event = window.event;
    if (event.wheelDelta) { /* IE/Opera. */
        delta = event.wheelDelta/120;
        /** In Opera 9, delta differs in sign as compared to IE.
        */
        if (window.opera) delta = -delta;
    } else if (event.detail) { /** Mozilla case. */
        /** In Mozilla, sign of delta is different than in IE.
        * Also, delta is multiple of 3.
        */
        delta = -event.detail/3;
    }
    /** If delta is nonzero, handle it.
    * Basically, delta is now positive if wheel was scrolled up,
    * and negative, if wheel was scrolled down.
    */
    if (delta) mwheelhandle(delta);
    /** Prevent default actions caused by mouse wheel.
    * That might be ugly, but we handle scrolls somehow
    * anyway, so don't bother here..
    */
    if (event.preventDefault) event.preventDefault();
	event.returnValue = false;
}
/** Initialization code. 
 * If you use your own event management code, change it as required.
 */
function mwheelinit() {
    if (window.addEventListener) window.addEventListener('DOMMouseScroll', mwheel, false); // DOMMouseScroll is for mozilla.
    window.onmousewheel = document.onmousewheel = mwheel; // IE/Opera
}





var mabsx = 0;
function updatemouseabsx(e) {
    if (document.all && event.clientX){ mabsx = event.clientX + document.body.scrollLeft; } // must be IE
    else { e = e || window.event; mabsx = e.pageX; }
    if (mabsx < 0) mabsx = 0; // prevent any negative values
}
addevent(document,'mousemove',updatemouseabsx);
var mabsy = 0;
function updatemouseabsy(e) {
    if (document.all && event.clientY){ mabsy = event.clientY + document.body.scrollTop; } // must be IE
    else { e = e || window.event; mabsy = e.pageY; }
    if (mabsy < 0) mabsy = 0; // prevent any negative values
}
addevent(document,'mousemove',updatemouseabsy);
function getmouseabsx() {
	return mabsx;
}
function getmouseabsy() {
	return mabsy;
}
function getmouserelx(eleid) {
	return getmouseabsx()-geteleabsx(eleid);
}
function getmouserely(eleid) {
	return getmouseabsy()-geteleabsy(eleid);
}