regular expression: describes a pattern of characters

JavaScript需要將特定字元篩選出來，然後移除掉。
這時候就需要RegExp啦!!
兩個reference：
JavaScript RegExp Object
Regular Expression (RegExp) in JavaScript

my code:

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printf("errorChar = \"\";\n\n"); // JavaScript RegExp Object printf("var charPattern = /\\~|\\`/g;\n\n"); printf("errorChar = value.match(charPattern);\n\n"); // If not null, found unacceptable character printf("if (errorChar != null)\n\n"); printf("{\n\n"); printf("errorChar = errorChar + ' is not acceptable character.';\n\n"); printf("alert (errorChar);\n\n"); // remove unacceptable character printf("switch(detectFrm)\n\n"); printf("{\n\n"); printf("case 1:\n\n"); // Subscriber ID printf("document.adslLineConfFRM.i_lineInforId.value = value.replace(charPattern,\"\")\n\n"); printf("break;\n\n"); printf("case 2:\n\n"); // Subscriber Name ... printf("}\n\n"); printf("}\n\n");