function scMultiAdd(which, thisel){
var value = parseInt(thisel.value);
	if(which == 'focus'){
		if(value == 0){
			thisel.value = '';
		}
	}
	if(which == 'blur'){
		if(value < 0 || isNaN(value) || value == ''){
			thisel.value = '0';
		}
	}
}


sfHover = function() {
	var sfEls = document.getElementById("nav").getElementsByTagName("LI");
	for (var i=0; i<sfEls.length; i++) {
		sfEls[i].onmouseover=function() {
			this.className+=" sfhover";
		}
		sfEls[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
		}
	}
}
if (window.attachEvent) window.attachEvent("onload", sfHover);