/* Ivan@ArtEnergy.com */	
	function calculate_total() {
		var total=0;
		var n=1;
		while(document.getElementsByName("box"+n).length){
			n++;
			if(n>100) break;
		}
		for(i=1;i<n;i++) {
			if(eval("document.skelet.box"+i+".checked")==true) {
				total += eval("document.skelet.price"+i+".value*document.skelet.qty"+i+".value");
			}
		}
		if(total==0) {
			document.skelet.total.value="Call";
			document.getElementById("add_to_cart").disabled="true";
		} else {
			document.skelet.total.value="$"+total;
		}
	}