isMac = (navigator.appVersion.indexOf("Mac")!=-1) ? true : false;
IE4 = ((document.all)&&(navigator.appVersion.indexOf("MSIE 4.")!=-1)) ? true : false;
IEmac = ((document.all)&&(isMac)) ? true : false;

// Body onload utility (supports multiple onload functions)
var gSafeOnload = new Array();
function SafeAddOnload(f)
{
	if (IEmac && IE4)  // IE 4.5 blows out on testing window.onload
	{
		window.onload = SafeOnload;
		gSafeOnload[gSafeOnload.length] = f;
	}
	else if (window.onload)
	{
		if (window.onload != SafeOnload)
		{
			gSafeOnload[0] = window.onload;
			window.onload = SafeOnload;
		}		
		gSafeOnload[gSafeOnload.length] = f;
	}
	else
	{
		window.onload = f;
	}
}
function SafeOnload()
{
	for (var i=0;i<gSafeOnload.length;i++) {
		gSafeOnload[i]();
	}
}
window.onload = SafeOnload;
// Call the following with your function as the argument
// SafeAddOnload(yourfunctioname);