function addOnloadEvent(fnc){  
if ( typeof window.addEventListener != "undefined" )  
window.addEventListener( "load", fnc, false );  
else if ( typeof window.attachEvent != "undefined" ) {  
window.attachEvent( "onload", fnc );  
}  
else {  
if ( window.onload != null ) {  
var oldOnload = window.onload;  
window.onload = function ( e ) {  
oldOnload( e );  
window[fnc]();  
};  
}  
else  
window.onload = fnc;  
}
}