给个解释啊。为什么
missing ; before statement[在此错误处中断] msg = "输入的Email为： "" + str + ""\r\n" ; （19行）
<html>
<head>
<mete http-equiv="content-type" content="text/html;charset=GB2312" />
<title>9-2 判断用户输入是否符合"Email"地址格式 </title>
<!--样式表 -->
<style>
*{font-size:12px;font-family:宋体,Arial;font-weight:normal;color:#333; } /*规定了所有的字体样式*/
</style>
<script>
function check(){
var str, result1, result2, timecost1, timecost2, timer, msg;
str = document.getElementById("txtEmail").value;
timecost1 = (new Date()).getTime();
for(var i=0;i<1000;i++)validateEmailByReg(str);
timecost1 = (new Date()).getTime() - timecost1;
timecost2 = (new Date()).getTime();
for(var i=0;i<1000;i++)validateEmail(str);
timecost2 = (new Date()).getTime() - timecost2;
msg = "输入的Email为： "" + str + ""\r\n" ;
msg += "用正则测试的结果为： \t" + (validateEmailByReg(str)?"通过":"不通过") + "运算1000遍耗时" + timecost1 + "毫秒。 \r\n";
msg += "不用正则测试的结果为： \t" + (validateEmail(str)?"通过":"不通过") + "运算1000遍耗时" + timecost2 + "毫秒。 \r\n";
alert(msg);
}
function validateEmailByReg(str){
return(/^\w+([-+.]\w+)*@\w([-.]\w+)*\.\w+([-.]\w+)*$/.test(str));
}
function validateEmail(str){
var flg01, flg02, previousCharType;
flg01 = false;
flg02 = false;
for(var i=1; i<str.length; i++){
switch(charType(str.charAt(i))){
case "ascii":
if(previousCharType!="ascii")previousCharType = "ascii";
break;
case "-":
if(previousCharType!="ascii")return(false);
previousCharType = "-";
break;
case ".":
if(previousCharType!="ascii")return(false);
if(flg01)flg02=true;
previousCharType = ".";
break;
case "+":
if(previousCharType!="ascii" || flg01)return(false);
previousCharType = "+";
break;
case "@":
if(previousCharType!="ascii" || flg01)return(false);
previousCharType = "@";
break;
default:
return(false);
break;
}
}
if(!flg01 || !flg02)return(false);
return(true);
}
function charType(val){
var asciiChars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
if(asciiChars.indexOf(val)!=-1){
return("ascii");
}else{
return(val);
}
</script>
</head>
<body style="overflow:auto;">
E-Mail:
<input id="txtEmail"><br/>
<input type="button" value="测试" onclick= "check()">
</body>
</html>
