function ao(c,txt,val,idx){
	c.options[idx] = new Option(txt,val);
}
function setSizes(c, s){
	var id;
	var x=0;
	var opt;
	if (!s || !c)
		return;
	if (c.selectedIndex < 1){
		clearSizes();
		return;
	}
	id = c.options[c.selectedIndex].value;
	s.options.length = 0;
	opt = new Option('Please select a size', '');
	s.options[x++] = opt;
	switch(id){
	
		
		    case "ZEBRA B/W":
		  
		    ao(s, "YS 20\" - $19.09","YS 20\"", x++);
		  
		    ao(s, "YM 23\" - $19.09","YM 23\"", x++);
		  
		    ao(s, "YL 26\" - $19.09","YL 26\"", x++);
		  
		    ao(s, "AS 28\" - $19.09","AS 28\"", x++);
		  
		    ao(s, "AM 29\" - $19.09","AM 29\"", x++);
		  
		    ao(s, "AL 31\" - $19.09","AL 31\"", x++);
		  
		    ao(s, "AXL 33\" - $19.09","AXL 33\"", x++);
		  
		    ao(s, "A2XL 35\" - $21.19","A2XL 35\"", x++);
		  
		    break;
		  
	  
	}
}

function initSizes (){
	var s, c, f=document.frmOrder;
	
	if ( !f )
		return;
			
	s = f.sizes;
	c = f.colors;
	if (!c || !s)
		return;
	if (c.selectedIndex > 0){
		setSizes(c, s);
	} else {		
		s.options.length = 0;
		var opt = new Option('Please select a color first', '');
		s.options[0] = opt;
	}
}
function clearSizes (){
	var s, c, f=document.frmOrder;
	
	if ( !f )
		return;
	
	s = f.sizes;
	c = f.colors;
	if (!c || !s)
		return;
	if (c.selectedIndex > 0)
		return;
	s.options.length = 0;
	var opt = new Option('Please select a color first', '');
	s.options[0] = opt;
}
window.onload = initSizes;