function addOnLoad(func) {
    if(window.addEventListener) { // gecko, safari, konqueror and standard
	    window.addEventListener('load', func, false); 		
    } else if(document.addEventListener) { // opera 7
	    document.addEventListener('load', func, false); 		
    } else if(window.attachEvent) { // win/ie
	    window.attachEvent('onload', func);
    } else { 										
	    if(typeof window.onload == 'function') {
		    var existing = onload;
		    window.onload = function() {
		        existing();
			    func();
		    }
	    } else {
		    window.onload = func;
	    }
    }
}