function expandCollapse() 
{
	for (var i=0; i<expandCollapse.arguments.length; i++) 
	{
		var element = document.getElementById(expandCollapse.arguments[i]);
		element.style.display = (element.style.display == "none") ? "block" : "none";
	}
}

function togglebutton(link)
{
		var element = document.getElementById(link);
		//alert(window.getComputedStyle(element,null).backgroundImage);
		
		if(element.style.backgroundImage == "url(images/tph_minus.gif)")
			element.style.backgroundImage = "url(images/tph_plus.gif)";
		else if(element.style.backgroundImage = "url(images/tph_plus.gif)" )
			element.style.backgroundImage = "url(images/tph_minus.gif)";	

}