function getStyle(elt,pro)

{

var element = document.getElementById(elt);

if (window.getComputedStyle) // Mozilla

	{

	var propriete = window.getComputedStyle(element,null).getPropertyValue(pro);

	}

else if (element.currentStyle) // Microsoft Internet Explorer

	{

	// Formatage (IE)

	while (pro.indexOf('-') != -1) 

		{

		var lettresuivtiret = pro.charAt(pro.indexOf('-')+1);

		pro = pro.replace(/-\S{1}/,lettresuivtiret.toUpperCase());

		}

	var propriete = eval('element.currentStyle.'+pro);

	}

return propriete;

}

function toggle (idDetail,idButton) {

	var style = document.getElementById(idDetail).style;
	var style = document.getElementById(idDetail).style;

	if(getStyle(idDetail,'display')=="none") 
	{ 
 	  style.display = "block";
 	  idButton.value = "hide speakers";
	} 
	else 
	{
	  style.display = "none";
 	  idButton.value = "view speakers";
	}
}

function toggleAbstract (idDetail,idButton) {

	var style = document.getElementById(idDetail).style;
	var style = document.getElementById(idDetail).style;

	if(getStyle(idDetail,'display')=="none") 
	{ 
 	  style.display = "block";
 	  idButton.value = "hide abstract";
	} 
	else 
	{
	  style.display = "none";
 	  idButton.value = "view abstract";
	}
}