Общий вес и сумма товаров - Разработки и улучшения

<span id="block_price_all"><?php print formatprice($this->product->getPriceCalculate())?></span>

<span id="block_weight_all"><?php print formatweight($this->product->getWeight())?> </span><?php print _JSHOP_WEIGHT_UNIT?>

<script type="text/javascript">
	function ChangeText()
		 {
		 var qty = document.getElementById('quantity').value;
		 if( !isNaN( qty ) && qty > 0 )
		 {
			 ves = document.getElementById('block_weight').firstChild.nodeValue;
			 cena = document.getElementById('block_price').firstChild.nodeValue;
			 w=parseFloat(ves);
			 c=parseInt(cena);
			 var res1;
			 var res2;
			 res1 = qty*w;
			 res2 = qty*c;		 
			 res1 = res1.toFixed(3);
			 res2 = res2.toFixed(2);
			 document.getElementById("block_weight_all").innerHTML=res1;
			 document.getElementById("block_price_all").innerHTML=res2;
		 }
		 else
		 {
			qty_el.value=1;
			ChangeText();
		 }
	}
	window.onload = function()
	{
		ChangeText();
		fragTimer = window.setInterval('ChangeText()',2000);	
	}
</script>