function ajout_espaces_milliers(val) {
	
	var tabval = val.split(' ');
	var string = '';
	for(var i=0, j=tabval.length; i<j ; i++ )
		string += tabval[i];
	
	var tabstring = string.split('');
	tabstring.reverse();
	
	var inverseTab = new Array();
	var pallier = 0;
	for(var i=0, j=tabstring.length ; i<j; i++ )
		{
		if(pallier<3)
			{
			inverseTab[inverseTab.length] = tabstring[i];
			pallier = pallier + 1;
			}
		else
			{
			inverseTab[inverseTab.length] = ' ';
			pallier=0;
			i = i-1;
			}
		}
		
	inverseTab.reverse();
	
	var finalString = '';
	for(var i=0, j=inverseTab.length; i<j; i++)
		{
		finalString += inverseTab[i];
		}
		
	return finalString;
	
}