var product_num = 1;
	
	function products_next() {
		document.getElementById('product' + product_num).style.display = 'none';
		if(product_num == 5) {
			product_num = 1;
		} else {
			product_num++;
		}
		document.getElementById('product' + product_num).style.display = 'block';
	}
	
	function products_back() {
		document.getElementById('product' + product_num).style.display = 'none';
		if(product_num == 1) {
			product_num = 5;
		} else {
			product_num--;
		}
		document.getElementById('product' + product_num).style.display = 'block';
	}


	function switch_tab(tab_num, start, end) {
		
		if(!start) start = 1;
		if(!end) end = 4;
		
		for(x=start; x<end; x++) {
			document.getElementById('tab_link' + x).className = "";
			document.getElementById('tab' + x).style.display = "none";
		}
		
		document.getElementById('tab_link' + tab_num).className = "active";
		document.getElementById('tab' + tab_num).style.display = "block";
	}



	// Begin Image Preload Function
	
	var preloaded = new Array();
	
	function preload() { 
		for(i=0; i<preload.arguments.length; i++) {
			preloaded[i] = document.createElement('img');
			preloaded[i].setAttribute('src', preload.arguments[i]);
		}
	}