function change_product_tab_div(value)
	{
		document.getElementById('div_product_tab_ads').style.display = 'none';
		document.getElementById('div_product_tab_specials').style.display = 'none';
		document.getElementById('div_product_tab_news').style.display = 'none';
		document.getElementById('div_product_tab_top').style.display = 'none';
		
		document.getElementById('triangle-down_1').style.display = 'none';
		document.getElementById('triangle-down_2').style.display = 'none';
		document.getElementById('triangle-down_3').style.display = 'none';
		document.getElementById('triangle-down_4').style.display = 'none';


		if (document.getElementById('product_tab_1')) {
		document.getElementById('product_tab_1').className = 'tab_1_class';
		}
		
		if (document.getElementById('product_tab_2')) {
		document.getElementById('product_tab_2').className = 'tab_2_class';
		}
		
		if (document.getElementById('product_tab_3')) {
		document.getElementById('product_tab_3').className = 'tab_3_class';
		}
		
		if (document.getElementById('product_tab_4')) {
		document.getElementById('product_tab_4').className = 'tab_4_class';
		}
		
		switch (value)
		{
			case 'ads':
				document.getElementById('div_product_tab_ads').style.display = 'block';
				document.getElementById('triangle-down_1').style.display = 'block';				
				document.getElementById('product_tab_1').className = 'tab_1_selected';
				break;
			case 'specials':
				document.getElementById('div_product_tab_specials').style.display = 'block';
				document.getElementById('triangle-down_2').style.display = 'block';				
				document.getElementById('product_tab_2').className = 'tab_2_selected';
				break;
			case 'news':
				document.getElementById('div_product_tab_news').style.display = 'block';
				document.getElementById('triangle-down_3').style.display = 'block';				
				document.getElementById('product_tab_3').className = 'tab_3_selected';
				break;
			case 'top':
				document.getElementById('div_product_tab_top').style.display = 'block';
				document.getElementById('triangle-down_4').style.display = 'block';
				document.getElementById('product_tab_4').className = 'tab_4_selected';
				break;
		}
	}