tec_showtab = function(tabnum, unf_el){
	
	if (!gd('tabcontent'+tabnum))
		return false;
		
	for(var i = 0; i < 10; i++){
		if (!gd('tabcontent'+i))
			break;
		gd('tabcontent'+i).style.display = 'none';
		gd('tab'+i).style.borderBottomColor = '#7E7A6F';
		gd('tab'+i).style.backgroundColor = '#E4E1DA';
	}
	
	gd('tabcontent'+tabnum).style.display = 'block';
	gd('tab'+tabnum).style.borderBottomColor = '#FFFFFF';
	gd('tab'+tabnum).style.backgroundColor = '#FFFFFF';
	
}