/*
Purpose:	Adds a function to the window.onload event.
			This is useful for when you want window.onload to execute more than one function.
			Note: If multiple functions are added to window.onload they will be called in the order that they were added

Usage:

//add a predefined function to window.onload
addLoadEvent(nameOfSomeFunctionToRunOnPageLoad);

//add a function definition to window.onload
addLoadEvent(function() 
{
   //more code to run on page load
});
*/
function addLoadEvent(func) 
{
	var oldonload = window.onload;
	if (typeof window.onload != 'function') 
		window.onload = func;
	else 
	{
		window.onload = function() 
		{
			if (oldonload) 
				oldonload();
			func();
		}
    }
}