第一種:
var sNum="sss%dfsdf"; //要判斷字符
sNum=CtoH(sNum);
var reNum =/^(?:[a-zA-Z_~@#%&-]+|[0-9~@#%&-\_]+|[a-zA-Z0-9]+|(.{0,}[\u4E00-\u9FA5]+.{0,}))$/;
var sNeW=!reNum.test(sNum);
//全角轉半角
function CtoH(str)
{
var result="";
for (var i = 0; i < str.length; i++)
{
if (str.charCodeAt(i)==12288)
{
result+= String.fromCharCode(str.charCodeAt(i)-12256); continue;
}
if (str.charCodeAt(i)>65280 && str.charCodeAt(i)<65375)
result+= String.fromCharCode(str.charCodeAt(i)-65248);
else
result+= String.fromCharCode(str.charCodeAt(i));
}
return result;
}