function trim(str) {
res="";
for(var i=0; i< str.length; i++) {
if (str.charAt(i) != " " && str.charAt(i) != "　") {
res +=str.charAt(i);
}
}
return res;
}//trim()

var bName = navigator.appName;
nc = (bName == "Netscape") ? true : false;
ie = (bName == "Microsoft Internet Explorer") ? true : false;
function Check_num() {
	if(nc) document.onkeypress = keyDown;
	else if ((event.keyCode < 48 || event.keyCode > 57) && event.keyCode != 13 && event.keyCode != 46) event.returnValue = false;
}
function keyDown(e){
	var nkey=e.which;
	if (nkey >= 48 && nkey <= 57 || nkey==46 || nkey==13 || nkey==8 || nkey==0) return true;
	else return false;
}
function Cls_event(){
	document.onkeypress = "";
}


/*檢查是否為Email格式*/
function chkemail(objName) {
	var obj = objName;
	var c = obj.value.charAt(0);
	if (!((c>="a" && c<="z") || (c>="0" && c<="9") || (c>="A" && c<="Z"))) {
		alert("Email format is incorrect, please review your entry!");
		obj.focus();
		return(false);
	}
	var c = obj.value.charAt(obj.value.length-1);
	if (!((c>="a" && c<="z") || (c>="0" && c<="9") || (c>="A" && c<="Z"))) {
		alert("Email format is incorrect, please review your entry!");
		obj.focus();
		return(false);
	}
	if ((obj.value.indexOf("@")=="-1") || (obj.value.indexOf(".")=="-1")) {
		alert("Email format is incorrect, please review your entry!");
		obj.focus();
		return(false);
	} 
	return(true);
}