function sel_disp(obj) {
	document.getElementById("tab1").className = "tab1";
	document.getElementById("tab2").className = "tab2";
	document.getElementById("tab3").className = "tab2";
	switch(obj.id) {
		case "tab1": obj.className = "tab3"; break;
		case "tab2": obj.className = "tab4"; break;
		case "tab3": obj.className = "tab4"; break;
	}
}

function check_float(obj) {
	if(/^[0-9.]{0,25}$/.test(obj.value)) {
	}
	else {
		obj.value = "0";
	}
}

function WinW() {
	if (parseInt(navigator.appVersion)>3) {
		if (navigator.appName=="Netscape" || navigator.appName == "Opera") {
			return window.innerWidth-20;
		}
		if (navigator.appName.indexOf("Microsoft")!=-1) {
			iebody=(document.compatMode=="CSS1Compat")? document.documentElement : document.body;
			return iebody.offsetWidth;
		}
	}
}

function WinH() {
	if (parseInt(navigator.appVersion)>3) {
		if (navigator.appName=="Netscape" || navigator.appName == "Opera") {
			return window.innerHeight;
		}
		if (navigator.appName.indexOf("Microsoft")!=-1) {
			iebody=(document.compatMode=="CSS1Compat")? document.documentElement : document.body;
			return iebody.offsetHeight;
		}
	}
}

function ScrollY() {
	if (parseInt(navigator.appVersion)>3) {
		if (navigator.appName=="Netscape" || navigator.appName == "Opera") {
			return window.pageYOffset;
		}
		if (navigator.appName.indexOf("Microsoft")!=-1) {
			iebody=(document.compatMode=="CSS1Compat")? document.documentElement : document.body;
			return iebody.scrollTop;
		}
	}
}