function check_all () {
	elements=document.getElementsByName('cart_delete[]');
	for (var i = elements.length - 1; i >= 0; i--){
		elements[i].checked=1
	}
}
function uncheck_all () {
	elements=document.getElementsByName('cart_delete[]');
	for (var i = elements.length - 1; i >= 0; i--){
		elements[i].checked=0
	}
}

if(typeof(window.external) != 'undefined'){
	document.getElementsByName = function(name, tag){
	    if(!tag){
	        tag = '*';
	    }
	    var elems = document.getElementsByTagName(tag);
	    var res = []
	    for(var i=0;i<elems.length;i++){
	        att = elems[i].getAttribute('name');
	        if(att == name) {
	            res.push(elems[i]);
	        }
	    }
	    return res;
	}	
}